Forgejo Actions Syntax Fixes

.forgejo/workflows/build.yml

@@ -6,12 +6,8 @@ jobs:
             name: Placeholder
             run: echo Placeholder Job
 
-on:
-    push:
-        tags:
-            - /^((([\d])+\.){1,2}[\d]+)\s*$/
-jobs:
     build:
+        if: ${{  github.ref_name }} =~ /^((([\d])+\.){1,2}[\d]+)\s*$/ && ${{  github.ref_name }}
         runs-on: docker
         container: rust:latest
         steps: