omit build workflow on tags

Author: spyoungtech

.github/workflows/build.yaml

@@ -1,6 +1,10 @@
 name: Rust
 
-on: [push, pull_request]
+on:
+  push:
+    tags-ignore:
+      - v*.*.*
+  pull_request: {}
 
 env:
   CARGO_TERM_COLOR: always