Fix broken documentation links

See gh-19936

Author: snicoll

spring-boot-project/spring-boot-docs/src/main/asciidoc/documentation-overview.adoc

@@ -88,4 +88,4 @@ Finally, we have a few topics for more advanced users:
 
 * *Spring Boot Applications Deployment:* <<deployment.adoc#cloud-deployment, Cloud Deployment>> | <<deployment.adoc#deployment-service, OS Service>>
 * *Build tool plugins:* <<build-tool-plugins.adoc#build-tool-plugins-maven-plugin, Maven>> | <<build-tool-plugins.adoc#build-tool-plugins-gradle-plugin, Gradle>>
-* *Appendix:* <<appendix-application-properties.adoc#common-application-properties,Application Properties>> | <<appendix-configuration-metadata.adoc#configuration-metadata,Configuration Metadata>> | <<appendix-auto-configuration-classes.adoc#auto-configuration-classes,Auto-configuration Classes>> | <<appendix-test-auto-configuration.adoc#test-auto-configuration,Test Auto-configuration Annotations>> | <<appendix-executable-jar-format.adoc#executable-jar,Executable Jars>> | <<appendix-dependency-versions.adoc#appendex-dependency-versions,Dependency Versions>>
+* *Appendix:* <<appendix-application-properties.adoc#common-application-properties,Application Properties>> | <<appendix-configuration-metadata.adoc#configuration-metadata,Configuration Metadata>> | <<appendix-auto-configuration-classes.adoc#auto-configuration-classes,Auto-configuration Classes>> | <<appendix-test-auto-configuration.adoc#test-auto-configuration,Test Auto-configuration Annotations>> | <<appendix-executable-jar-format.adoc#executable-jar,Executable Jars>> | <<appendix-dependency-versions.adoc#dependency-versions,Dependency Versions>>

spring-boot-project/spring-boot-docs/src/main/asciidoc/howto.adoc

@@ -2330,7 +2330,7 @@ See {spring-boot-autoconfigure-module-code}/groovy/template/GroovyTemplateAutoCo
 [[howto-reload-fast-restart]]
 === Fast Application Restarts
 The `spring-boot-devtools` module includes support for automatic application restarts.
-While not as fast as technologies such as https://jrebel.com/software/jrebel/[JRebel] it is usually significantly faster than a "`cold start`".
+While not as fast as technologies such as https://www.jrebel.com/products/jrebel[JRebel] it is usually significantly faster than a "`cold start`".
 You should probably give it a try before investigating some of the more complex reload options discussed later in this document.
 
 For more details, see the <<using-spring-boot.adoc#using-boot-devtools>> section.

spring-boot-project/spring-boot-docs/src/main/asciidoc/spring-boot-cli.adoc

@@ -171,7 +171,7 @@ Doing so consults Spring Boot's default dependency metadata to deduce the artifa
 
 NOTE: The default metadata is tied to the version of the CLI that you use.
 It changes only when you move to a new version of the CLI, putting you in control of when the versions of your dependencies may change.
-A table showing the dependencies and their versions that are included in the default metadata can be found in the <<appendix-dependency-versions.adoc#appendix-dependency-versions,appendix>>.
+A table showing the dependencies and their versions that are included in the default metadata can be found in the <<appendix-dependency-versions.adoc#dependency-versions,appendix>>.
 
 
 

spring-boot-project/spring-boot-docs/src/main/asciidoc/spring-boot-features.adoc

@@ -4478,7 +4478,7 @@ You can also inject an auto-configured `LdapTemplate` instance as you would with
 
 [[boot-features-ldap-embedded]]
 ==== Embedded In-memory LDAP Server
-For testing purposes, Spring Boot supports auto-configuration of an in-memory LDAP server from https://www.ldap.com/unboundid-ldap-sdk-for-java[UnboundID].
+For testing purposes, Spring Boot supports auto-configuration of an in-memory LDAP server from https://ldap.com/unboundid-ldap-sdk-for-java/[UnboundID].
 To configure the server, add a dependency to `com.unboundid:unboundid-ldapsdk` and declare a configprop:spring.ldap.embedded.base-dn[] property, as follows:
 
 [source,properties,indent=0,configprops]
@@ -4901,7 +4901,7 @@ By default, ActiveMQ creates a destination if it does not yet exist so that dest
 
 [[boot-features-artemis]]
 ==== Artemis Support
-Spring Boot can auto-configure a `ConnectionFactory` when it detects that https://activemq.apache.org/artemis/[Artemis] is available on the classpath.
+Spring Boot can auto-configure a `ConnectionFactory` when it detects that https://activemq.apache.org/components/artemis/[Artemis] is available on the classpath.
 If the broker is present, an embedded broker is automatically started and configured (unless the mode property has been explicitly set).
 The supported modes are `embedded` (to make explicit that an embedded broker is required and that an error should occur if the broker is not available on the classpath) and `native` (to connect to a broker using the `netty` transport protocol).
 When the latter is configured, Spring Boot configures a `ConnectionFactory` that connects to a broker running on the local machine with the default settings.
@@ -5907,11 +5907,11 @@ If you have migrated your tests to JUnit 5, you should exclude JUnit 4 support,
 === Test Scope Dependencies
 The `spring-boot-starter-test` "`Starter`" (in the `test` `scope`) contains the following provided libraries:
 
-* https://junit.org/junit5[JUnit 5] (including the vintage engine for backward compatibility with JUnit 4): The de-facto standard for unit testing Java applications.
+* https://junit.org/junit5/[JUnit 5] (including the vintage engine for backward compatibility with JUnit 4): The de-facto standard for unit testing Java applications.
 * {spring-framework-docs}testing.html#integration-testing[Spring Test] & Spring Boot Test: Utilities and integration test support for Spring Boot applications.
-* https://joel-costigliola.github.io/assertj/[AssertJ]: A fluent assertion library.
+* https://assertj.github.io/doc/[AssertJ]: A fluent assertion library.
 * https://github.com/hamcrest/JavaHamcrest[Hamcrest]: A library of matcher objects (also known as constraints or predicates).
-* https://mockito.github.io[Mockito]: A Java mocking framework.
+* https://site.mockito.org/[Mockito]: A Java mocking framework.
 * https://github.com/skyscreamer/JSONassert[JSONassert]: An assertion library for JSON.
 * https://github.com/jayway/JsonPath[JsonPath]: XPath for JSON.
 
@@ -7702,7 +7702,7 @@ If you need the `Mockk` equivalent of the Mockito specific <<boot-features-testi
 [[boot-features-kotlin-resources-further-reading]]
 ==== Further reading
 * {kotlin-docs}[Kotlin language reference]
-* https://slack.kotlinlang.org/[Kotlin Slack] (with a dedicated #spring channel)
+* https://kotlinlang.slack.com/[Kotlin Slack] (with a dedicated #spring channel)
 * https://stackoverflow.com/questions/tagged/spring+kotlin[Stackoverflow with `spring` and `kotlin` tags]
 * https://try.kotlinlang.org/[Try Kotlin in your browser]
 * https://blog.jetbrains.com/kotlin/[Kotlin blog]

spring-boot-project/spring-boot-docs/src/main/asciidoc/using-spring-boot.adoc

@@ -622,7 +622,7 @@ You might also want to use the `JAVA_OPTS` operating system environment variable
 === Hot Swapping
 Since Spring Boot applications are just plain Java applications, JVM hot-swapping should work out of the box.
 JVM hot swapping is somewhat limited with the bytecode that it can replace.
-For a more complete solution, https://jrebel.com/software/jrebel/[JRebel] can be used.
+For a more complete solution, https://www.jrebel.com/products/jrebel[JRebel] can be used.
 
 The `spring-boot-devtools` module also includes support for quick application restarts.
 See the <<using-boot-devtools>> section later in this chapter and the <<howto.adoc#howto-hotswapping, Hot swapping "`How-to`">> for details.