Bump pmd.version from 7.7.0 to 7.8.0 (#551)

Bumps `pmd.version` from 7.7.0 to 7.8.0.

Updates `net.sourceforge.pmd:pmd-core` from 7.7.0 to 7.8.0
- [Release notes](https://github.com/pmd/pmd/releases)
- [Changelog](https://github.com/pmd/pmd/blob/main/docs/render_release_notes.rb)
- [Commits](pmd/pmd@pmd_releases/7.7.0...pmd_releases/7.8.0)

Updates `net.sourceforge.pmd:pmd-java` from 7.7.0 to 7.8.0
- [Release notes](https://github.com/pmd/pmd/releases)
- [Changelog](https://github.com/pmd/pmd/blob/main/docs/render_release_notes.rb)
- [Commits](pmd/pmd@pmd_releases/7.7.0...pmd_releases/7.8.0)

---
updated-dependencies:
- dependency-name: net.sourceforge.pmd:pmd-core
  dependency-type: direct:production
  update-type: version-update:semver-minor
- dependency-name: net.sourceforge.pmd:pmd-java
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <[email protected]>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

pom.xml

@@ -56,7 +56,7 @@
     <properties>
         <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
         <jdk.version>1.8</jdk.version>
-        <pmd.version>7.7.0</pmd.version>
+        <pmd.version>7.8.0</pmd.version>
         <maven.surefire.version>3.5.2</maven.surefire.version>
     </properties>