docs: correct link to Powertools for Java

[niko-achilles]

Description of your changes

Link to Powertools for Java . Http Url is changed from
https://awslabs.github.io/aws-lambda-powertools-java/latest/
to
https://awslabs.github.io/aws-lambda-powertools-java/

How to verify this change

Run documentation locally in Homepage read section Tip :
Powertools is also available for Python, Java, and .NET .
Click on the Java variant.
It should navigate to https://awslabs.github.io/aws-lambda-powertools-java/

Related issues, RFCs

Issue number: #1246

PR status

Is this ready for review?: YES
Is it a breaking change?: NO

Checklist

• My changes meet the tenets criteria
• I have performed a self-review of my own code
• I have commented my code where necessary, particularly in areas that should be flagged with a TODO, or hard-to-understand areas
• I have made corresponding changes to the documentation
• I have made corresponding changes to the examples
• My changes generate no new warnings
• The code coverage hasn't decreased
• I have added tests that prove my change is effective and works
• New and existing unit tests pass locally and in Github Actions
• Any dependent changes have been merged and published
• The PR title follows the conventional commit semantics

Breaking change checklist

• I have documented the migration process
• I have added, implemented necessary warnings (if it can live side by side)

---

By submitting this pull request, I confirm that you can use, modify, copy, and redistribute this contribution, under the terms of your choice.

[dreamorosi]

Thanks for fixing this!