fix ci script

.gitlab-ci.yml

@@ -39,13 +39,15 @@ release:
     only:
       refs:
         - tags
+    variables:
+      RELEASE_FILE: opcua2mqtt-bridge-${CI_COMMIT_TAG}.tar.gz
     script:
         - pushd src
-        - tar -czvf ../opcua2mqtt-bridge-${CI_COMMIT_TAG}.tar.gz --exclude=__pycache__ *
+        - tar -czvf ../$RELEASE_FILE --exclude=__pycache__ *
         - popd
         - gitlabreleaseuploader.py -p "$PRIVATE_TOKEN" -i $CI_PROJECT_ID -u $CI_PROJECT_URL 
           -I https://devservice.krohne.com/git/
           -C
-          -f opcua2mqtt-bridge-${CI_COMMIT_TAG}.tar-gz
+          -f $RELEASE_FILE
           -T $CI_COMMIT_REF_NAME -t "$CI_COMMIT_TAG"
           -n "${CI_COMMIT_TAG} release" -d "Tarball of $CI_PROJECT_NAME, version $CI_COMMIT_TAG"