Update build_test.yml

Author: ConteZero

.github/workflows/build_test.yml

@@ -39,7 +39,7 @@ jobs:
 
     # Try to find and apply jbosstools cache
     - name: Cache local Maven repository for JBoss Tools components
-      uses: actions/cache@v2
+      uses: actions/cache@v4
       with:
         path: ~/.m2/repository
         key: jbosstools-${{ runner.os }}-maven-${{ hashFiles('**/pom.xml') }}