There's a merged pull request on the void-packages repository

openjdk11: update to 11.0.20+8.
https://github.com/void-linux/void-packages/pull/44620

Description:
Also fix openjdk11-jmods depending on itself instead of openjdk11.

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#### Testing the changes
- I tested the changes in this PR: **briefly**

@knusbaum

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#### Local build testing
- I built this PR locally for my native architecture, x86_64-glibc