ci: skip testing tags

Author: viceice

.github/workflows/build.yml

@@ -2,6 +2,8 @@ name: build
 
 on:
   push:
+    branches:
+      - '**'
 
 env:
   DOTNET_NOLOGO: true # https://github.com/actions/setup-dotnet#environment-variables-to-use-with-dotnet