Update maven.yml

Author: wjglerum

.github/workflows/maven.yml

@@ -38,5 +38,5 @@ jobs:
         distribution: 'temurin'
         cache: maven
     - name: Test with Maven
-      run: mvn -B verify --file pom.xml
+      run: ./mvnw -B verify --file pom.xml
       working-directory: ${{env.EXERCISES_DIRECTORY}}/${{matrix.exercise}}