Update dependency org.apache.maven.plugins:maven-compiler-plugin to v3.15.0

[renovate]

This PR contains the following updates:

Package	Change	Age	Confidence
org.apache.maven.plugins:maven-compiler-plugin (source)	3.14.1 → 3.15.0

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Configuration

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[yegor256]

@rultor please, try to merge, since 14 checks have passed

[rultor]

@rultor please, try to merge, since 14 checks have passed

@yegor256 OK, I'll try to merge now. You can check the progress of the merge here.

[rultor]

@rultor please, try to merge, since 14 checks have passed

@yegor256 Done! FYI, the full log is here (took me 7min).

[0crat]

@yegor256 Thank you for completing the code review! You've been awarded +4 points based on our team policy: +12 points as the base reward for conducting a review, -16 points due to no comments being posted during the review, -8 points for the contribution having only 2 hits-of-code (below the 16 minimum), with a final adjustment of +16 points to ensure you receive the minimum reward of 4 points. Your current running score is -972; please remember to check your Zerocracy account for updates.