Fix CI rule

Author: vbkaisetsu

.github/workflows/rust.yml

@@ -1,8 +1,12 @@
 on:
-  push:
-    branches: [ main ]
   pull_request:
-    branches: [ main ]
+    branches:
+      - main
+  push:
+    branches:
+      - main
+    tags:
+      - 'v*.*.*'
 
 name: build