try adding the _ first

Author: jakemac53

.github/workflows/publish.yaml

@@ -7,7 +7,7 @@ on:
   pull_request:
     branches: [ main ]
   push:
-    tags: [ '[A-z0-9]+-v[0-9]+.[0-9]+.[0-9]+' ]
+    tags: [ '[_A-Za-z0-9]+-v[0-9]+.[0-9]+.[0-9]+' ]
 
 jobs:
   publish: