Accept */* tag to follow the latest tag scheme

`*` does not match `/`
https://docs.github.com/en/actions/using-workflows/workflow-syntax-for-github-actions#filter-pattern-cheat-sheet

Author: kateinoigakukun

.github/workflows/build.yml

@@ -2,7 +2,7 @@ name: Build ruby.wasm
 on:
   push:
     branches: [main]
-    tags: ["*"]
+    tags: ["*/*"]
     paths-ignore:
       - "*.md"
       - "docs/**"