HELP.md contains broken links to the Maven and Gradle plugin reference docs

[victorgawk]

When generating code from Spring initializr using project Gradle - Groovy, language Java and version 3.3.1, inside HELP.md file there is two invalid URLs resulting in 404 Not Found error:

• https://docs.spring.io/spring-boot/docs/3.3.1/gradle-plugin/reference/html/
• https://docs.spring.io/spring-boot/docs/3.3.1/gradle-plugin/reference/html/#build-image

Error when opening these links in Google Chrome:

Code generation example:
https://start.spring.io/#!type=gradle-project&language=java&platformVersion=3.3.1&packaging=jar&jvmVersion=21&groupId=com.example&artifactId=demo&name=demo&description=Demo%20project%20for%20Spring%20Boot&packageName=com.example.demo&dependencies=

[wilkinsona]

There's a similar problem with Maven builds where the HELP.md contains the following links:

• https://docs.spring.io/spring-boot/docs/3.3.1/maven-plugin/reference/htmlsingle/
• https://docs.spring.io/spring-boot/docs/3.3.1/maven-plugin/reference/htmlsingle/#build-image

[philwebb]

The correct URLs are https://docs.spring.io/spring-boot/maven-plugin/index.html and https://docs.spring.io/spring-boot/gradle-plugin/index.html. We should fix the redirects.

[mhalbritter]

Superseded by #1541.