Only push when there are any automated changes

Author: timtebeek

.github/workflows/bump-snapshots.yml

@@ -29,4 +29,4 @@ jobs:
       - name: bump-rewrite-properties-to-snapshots
         run: |
           ./mvnw versions:update-properties -DincludeProperties=rewrite.version,rewrite.kotlin.version -DallowSnapshots=true
-          git diff-index --quiet HEAD pom.xml || git commit -m "Bump rewrite.version properties" pom.xml && git push origin main
+          git diff-index --quiet HEAD pom.xml || (git commit -m "Bump rewrite.version properties" pom.xml && git push origin main)

.github/workflows/publish.yml

@@ -61,4 +61,4 @@ jobs:
       - name: bump-rewrite-properties-to-snapshots
         run: |
           ./mvnw versions:update-properties -DincludeProperties=rewrite.version,rewrite.kotlin.version -DallowSnapshots=true
-          git diff-index --quiet HEAD pom.xml || git commit -m "Bump rewrite.version properties" pom.xml && git push origin main && rm -f pom.xml.versionsBackup
+          git diff-index --quiet HEAD pom.xml || (git commit -m "Bump rewrite.version properties" pom.xml && git push origin main && rm -f pom.xml.versionsBackup)