Regression: Fix services Docker image build (#21750)

.github/workflows/build_and_test.yml

@@ -600,9 +600,9 @@ jobs:
         docker push rocketchat/${{ matrix.service }}-service:${IMAGE_TAG}
 
         if [[ $GITHUB_REF == refs/tags/* ]]; then
-          if echo "$GIT_TAG" | grep -Eq '^[0-9]+\.[0-9]+\.[0-9]+$' ; then
+          if echo "$IMAGE_TAG" | grep -Eq '^[0-9]+\.[0-9]+\.[0-9]+$' ; then
             RELEASE="latest"
-          elif echo "$GIT_TAG" | grep -Eq '^[0-9]+\.[0-9]+\.[0-9]+-rc\.[0-9]+$' ; then
+          elif echo "$IMAGE_TAG" | grep -Eq '^[0-9]+\.[0-9]+\.[0-9]+-rc\.[0-9]+$' ; then
             RELEASE="release-candidate"
           fi