Add cache-dependency-path (#3622)

I noticed that on my  PR no caching is taking place.

Author: muuki88

.github/workflows/pr-java-ci.yml

@@ -27,6 +27,7 @@ jobs:
         with:
           distribution: 'temurin'
           cache: 'maven'
+          cache-dependency-path: extra/pom.xml
           java-version: ${{ matrix.java }}
 
       - name: Build with Maven