do not fail if version does not change

Author: Samueru-sama

.github/workflows/blank.yml

@@ -78,5 +78,5 @@ jobs:
             git config user.name "github-actions[bot]"
             git config user.email "github-actions[bot]@users.noreply.github.com"
             git add ./LATEST_VERSION
-            git commit -m 'bump `LATEST_VERSION` [skip ci]'
+            git commit --allow-empty -m 'bump `LATEST_VERSION` [skip ci]'
             git push