Use main for merge-dependabot-pr.yml

To test the latest changes

Signed-off-by: Artem Bilan <artem.bilan@broadcom.com>
(cherry picked from commit 70f9bca)

Author: artembilan

.github/workflows/merge-dependabot-pr.yml

@@ -12,7 +12,7 @@ jobs:
   merge-dependabot-pr:
     permissions: write-all
 
-    uses: spring-io/spring-github-workflows/.github/workflows/spring-merge-dependabot-pr.yml@v7
+    uses: spring-io/spring-github-workflows/.github/workflows/spring-merge-dependabot-pr.yml@main
     with:
       mergeArguments: --auto --squash
-      autoMergeSnapshots: true
+      autoMergeSnapshots: true