Match entire tag during build

.github/workflows/docker-hub.yml

@@ -15,7 +15,7 @@ jobs:
           ref=${ref##*/}
           if [[ $ref == master ]]; then
             tags=$repo:unstable
-          elif [[ $ref =~ ^([0-9.]+)-((([0-9]+[.])[0-9]+[.])([.][0-9+])*) ]]; then
+          elif [[ $ref =~ ^([0-9.]+)-((([0-9]+[.])[0-9]+[.])([.][0-9+])*)$ ]]; then
             upstream=${BASH_REMATCH[1]}
             minor=${BASH_REMATCH[3]}x
             major=${BASH_REMATCH[4]}x