Update cache version

Author: ryanjbaxter

.github/workflows/maven.yml

@@ -22,7 +22,7 @@ jobs:
           distribution: 'temurin'
           java-version: '17'
       - name: Cache local Maven repository
-        uses: actions/cache@v2
+        uses: actions/cache@v4
         with:
           path: ~/.m2/repository
           key: ${{ runner.os }}-maven-${{ hashFiles('**/pom.xml') }}
@@ -34,4 +34,4 @@ jobs:
         uses: mikepenz/action-junit-report@v2
         if: always() # always run even if the previous step fails
         with:
-          report_paths: '**/surefire-reports/TEST-*.xml'
+          report_paths: '**/surefire-reports/TEST-*.xml'