Dependency(deps): Bump picocli.version from 4.7.5 to 4.7.6

Bumps `picocli.version` from 4.7.5 to 4.7.6.

Updates `info.picocli:picocli` from 4.7.5 to 4.7.6
- [Release notes](https://github.com/remkop/picocli/releases)
- [Changelog](https://github.com/remkop/picocli/blob/main/RELEASE-NOTES.md)
- [Commits](remkop/picocli@v4.7.5...v4.7.6)

Updates `info.picocli:picocli-codegen` from 4.7.5 to 4.7.6
- [Release notes](https://github.com/remkop/picocli/releases)
- [Changelog](https://github.com/remkop/picocli/blob/main/RELEASE-NOTES.md)
- [Commits](remkop/picocli@v4.7.5...v4.7.6)

---
updated-dependencies:
- dependency-name: info.picocli:picocli
  dependency-type: direct:production
  update-type: version-update:semver-patch
- dependency-name: info.picocli:picocli-codegen
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

Signed-off-by: dependabot[bot] <support@github.com>

autograder-cmd/pom.xml

@@ -15,7 +15,7 @@
     <url>https://github.com/Feuermagier/autograder/autograder-cmd</url>
 
     <properties>
-        <picocli.version>4.7.5</picocli.version>
+        <picocli.version>4.7.6</picocli.version>
     </properties>
 
     <dependencies>