wrong version of javadocs in documentation

[42plat0]

Describe the bug
A clear and concise description of what the bug is.
Link to wrong version of jMonkeyEngine javadocs. Current version is 3.8, link is pointing to 3.4.1

To Reproduce
Steps to reproduce the behavior:

1. Go to documentation
2. Click on JavaDoc
3. See that its https://javadoc.jmonkeyengine.org/v3.4.1-stable/

Expected behavior
Documentation of current stable version of jMonkeyEngine

Screenshots
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Desktop (please complete the following information):

• OS: Ubuntu
• Browser Firefox
• Version [e.g. 22]

Additional context
Add any other context about the problem here.