update-readmeのトリガー修正 (#123)

Author: massongit

.github/workflows/update-readme.yml

@@ -3,6 +3,11 @@ name: update-readme
 
 on:
   pull_request:
+    types:
+      - opened
+      - synchronize
+      - reopened
+      - closed
   push:
     branches:
       - main