Update net.sourceforge.pmd to v7.8.0

[xdev-renovate]

This PR contains the following updates:

Package	Type	Update	Change
net.sourceforge.pmd:pmd-java (source)	build	minor	7.7.0 -> 7.8.0
net.sourceforge.pmd:pmd-core (source)	build	minor	7.7.0 -> 7.8.0

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