docs: Use released plugin 2.23.0 in docs (#563)

Author: HowieHz

docs/developer-guide/plugin/api-changelog.md

@@ -11,26 +11,15 @@ description: 记录每一个版本的插件 API 变更记录，方便开发者
 
 ```groovy
 repositories {
-    // TODO Remove this repository once the new version is released
-    maven {
-        name = 'Central Portal Snapshots'
-        url = 'https://central.sonatype.com/repository/maven-snapshots/'
-
-        // Only search this repository for the specific dependency
-        content {
-            includeGroupAndSubgroups('run.halo')
-        }
-    }
     mavenCentral()
 }
 
 dependencies {
-    // TODO Change to a released version once available
-    implementation platform('run.halo.tools.platform:plugin:2.23.0-SNAPSHOT')
+    implementation platform('run.halo.tools.platform:plugin:2.23.0')
 }
 
 halo {
-    version = '2.23.0-beta.2'
+    version = '2.23.0'
 }
 ```
 

versioned_docs/version-2.23/developer-guide/plugin/api-changelog.md

@@ -11,26 +11,15 @@ description: 记录每一个版本的插件 API 变更记录，方便开发者
 
 ```groovy
 repositories {
-    // TODO Remove this repository once the new version is released
-    maven {
-        name = 'Central Portal Snapshots'
-        url = 'https://central.sonatype.com/repository/maven-snapshots/'
-
-        // Only search this repository for the specific dependency
-        content {
-            includeGroupAndSubgroups('run.halo')
-        }
-    }
     mavenCentral()
 }
 
 dependencies {
-    // TODO Change to a released version once available
-    implementation platform('run.halo.tools.platform:plugin:2.23.0-SNAPSHOT')
+    implementation platform('run.halo.tools.platform:plugin:2.23.0')
 }
 
 halo {
-    version = '2.23.0-beta.2'
+    version = '2.23.0'
 }
 ```