chore: update action runtime to node20

nyaomaru · nyaomaru · commit 525ff10ea3f2 · 2025-08-30T19:05:43.000+09:00
diff --git a/action.yml b/action.yml
@@ -37,5 +37,5 @@ outputs:
     description: 'The created Git tag (if enabled)'
 
 runs:
-  using: 'node16'
+  using: 'node20'
   main: 'dist/index.js'
