Upgrade to Spring Boot 3.1.0

Author: Jay Bryant

README.adoc

@@ -1,5 +1,5 @@
 :spring_version: current
-:spring_boot_version: 3.0.2
+:spring_boot_version: 3.1.0
 :jackson: https://wiki.fasterxml.com/JacksonHome
 :SpringApplication: https://docs.spring.io/spring-boot/docs/{spring_boot_version}/api/org/springframework/boot/SpringApplication.html
 :EnableAsync: https://docs.spring.io/spring/docs/current/spring-framework-reference/html/scheduling.html#scheduling-annotation-support
@@ -34,7 +34,7 @@ include::https://raw.githubusercontent.com/spring-guides/getting-started-macros/
 [[scratch]]
 == Starting with Spring Initializr
 
-You can use this https://start.spring.io/#!type=gradle-project&language=java&platformVersion=3.0.2&packaging=jar&jvmVersion=17&groupId=com.example&artifactId=async-method&name=async-method&description=Demo%20project%20for%20Spring%20Boot&packageName=com.example.async-method&dependencies=web[pre-initialized project] and click Generate to download a ZIP file. This project is configured to fit the examples in this tutorial.
+You can use this https://start.spring.io/#!type=gradle-project&language=java&platformVersion=3.1.0&packaging=jar&jvmVersion=17&groupId=com.example&artifactId=async-method&name=async-method&description=Demo%20project%20for%20Spring%20Boot&packageName=com.example.async-method&dependencies=web[pre-initialized project] and click Generate to download a ZIP file. This project is configured to fit the examples in this tutorial.
 
 To manually initialize the project:
 

complete/build.gradle

@@ -1,5 +1,5 @@
 plugins {
-	id 'org.springframework.boot' version '3.0.0'
+	id 'org.springframework.boot' version '3.1.0'
 	id 'io.spring.dependency-management' version '1.1.0'
 	id 'java'
 }

complete/pom.xml

@@ -5,7 +5,7 @@
 	<parent>
 		<groupId>org.springframework.boot</groupId>
 		<artifactId>spring-boot-starter-parent</artifactId>
-		<version>3.0.0</version>
+		<version>3.1.0</version>
 		<relativePath/> <!-- lookup parent from repository -->
 	</parent>
 	<groupId>com.example</groupId>

initial/build.gradle

@@ -1,5 +1,5 @@
 plugins {
-	id 'org.springframework.boot' version '3.0.0'
+	id 'org.springframework.boot' version '3.1.0'
 	id 'io.spring.dependency-management' version '1.1.0'
 	id 'java'
 }

initial/pom.xml

@@ -5,7 +5,7 @@
 	<parent>
 		<groupId>org.springframework.boot</groupId>
 		<artifactId>spring-boot-starter-parent</artifactId>
-		<version>3.0.0</version>
+		<version>3.1.0</version>
 		<relativePath/> <!-- lookup parent from repository -->
 	</parent>
 	<groupId>com.example</groupId>