Fix GitHub Actions workflow tag names

Author: maennchen

.github/workflows/tag-beta.yml

@@ -1,7 +1,7 @@
 on:
   push:
     tags:
-      - "v[12].[0-9]+.[0-9]+-beta.[0-9]+"
+      - "[12].[0-9]+.[0-9]+-beta.[0-9]+"
 
 name: "Beta Tag"
 

.github/workflows/tag-stable.yml

@@ -1,7 +1,7 @@
 on:
   push:
     tags:
-      - "v[12].[0-9]+.[0-9]+"
+      - "[12].[0-9]+.[0-9]+"
 
 name: "Stable Tag"