Fix dependency-update.yml (#835)

Author: ArBridgeman

.github/workflows/dependency-update.yml

@@ -69,7 +69,7 @@ jobs:
         id: create-branch
         if: steps.check-for-poetry-lock-changes.outputs.changed == 'true'
         run: |
-          branch_name="dependency-update/$(date "+%Y-%m-%d_%H:%M:%S")"
+          branch_name="dependency-update/$(date "+%Y-%m-%d")"
           echo "Creating branch $branch_name"
           git switch -C "$branch_name"