chore: update doc versions in README (#3325)

* chore: update doc versions in README

* update 4.x and 3.x versions

* update 3.8.10 versions

* upgrade to newly released versions.

README.adoc

@@ -11,10 +11,10 @@ You can check our project website https://spring.io/projects/spring-cloud-gcp[he
 For a deep dive into the project, refer to the Spring Framework on Google Cloud Reference documentation or Javadocs:
 
 // {x-version-update-start:spring-cloud-gcp:released}
-* link:https://googlecloudplatform.github.io/spring-cloud-gcp/5.8.0/reference/html/index.html[Spring Framework on Google Cloud 5.6.1 (Latest)] - https://googleapis.dev/java/spring-cloud-gcp/5.6.1/index.html[Javadocs 5.6.1]
+* link:https://googlecloudplatform.github.io/spring-cloud-gcp/5.8.0/reference/html/index.html[Spring Framework on Google Cloud 5.8.0 (Latest)] - https://googleapis.dev/java/spring-cloud-gcp/5.8.0/index.html[Javadocs 5.8.0]
 // {x-version-update-end}
-* link:https://googlecloudplatform.github.io/spring-cloud-gcp/4.10.9/reference/html/index.html[Spring Framework on Google Cloud 4.10.9] - https://googleapis.dev/java/spring-cloud-gcp/4.10.9/index.html[Javadocs 4.10.9]
-* link:https://googlecloudplatform.github.io/spring-cloud-gcp/3.8.9/reference/html/index.html[Spring Framework on Google Cloud 3.8.9] - https://googleapis.dev/java/spring-cloud-gcp/3.8.9/index.html[Javadocs 3.8.9]
+* link:https://googlecloudplatform.github.io/spring-cloud-gcp/4.10.12/reference/html/index.html[Spring Framework on Google Cloud 4.10.12] - https://googleapis.dev/java/spring-cloud-gcp/4.10.12/index.html[Javadocs 4.10.12]
+* link:https://googlecloudplatform.github.io/spring-cloud-gcp/3.8.11/reference/html/index.html[Spring Framework on Google Cloud 3.8.11] - https://googleapis.dev/java/spring-cloud-gcp/3.8.11/index.html[Javadocs 3.8.11]
 
 If you prefer to learn by doing, try taking a look at the https://github.com/GoogleCloudPlatform/spring-cloud-gcp/tree/main/spring-cloud-gcp-samples[Spring Framework on Google Cloud sample applications] or the https://codelabs.developers.google.com/spring[Spring on Google Cloud codelabs].