Update maven.yml

Author: gbzarelli

.github/workflows/maven.yml

@@ -16,7 +16,9 @@ jobs:
     - uses: actions/checkout@v2
     - name: Set up JDK 11
       uses: actions/setup-java@v1
+      env:
+        COVERALLS_REPO_TOKEN: ${{ secrets.COVERALLS_REPO_TOKEN }}
       with:
         java-version: 11
     - name: Build with Maven
-      run: mvn -B verify coveralls:report -DrepoToken=$COVERALLS_REPO_TOKEN --file pom.xml
+      run: mvn -B verify coveralls:report -DrepoToken="$COVERALLS_REPO_TOKEN" --file pom.xml