Use stable action

Author: kachick

.github/workflows/dprint-update-plugin.yml

@@ -25,7 +25,7 @@ jobs:
     timeout-minutes: 15
     steps:
       - id: update-dprint-plugins
-        uses: kachick/action-update-dprint-plugins@main
+        uses: kachick/action-update-dprint-plugins@v1-beta
         with:
           base-branch: 'main'
           github-token: '${{ secrets.GITHUB_TOKEN }}'