Test push event for release tags.

Author: lystopad

.github/workflows/testing-vars.yml

@@ -18,6 +18,8 @@ on:
   push:
     branches:
       - 'main'
+    tags:
+      - v[0-9]+.[0-9]+.[0-9]+
     #tags:
       ## only trigger on release tags:
       #- 'v*.*.*'