chore: fix sync workflow (#33486)

### Issue # (if applicable)

N/A

### Reason for this change

Fix workflow failing with `Your push was rejected due to missing or corrupt local objects.`

### Description of changes

Add `--all` to git lfs fetch command

### Describe any new or updated permissions being added

n/a

### Description of how you validated changes

Manually ran workflow and confirmed it succeeded

### Checklist
- [x] My code adheres to the [CONTRIBUTING GUIDE](https://github.com/aws/aws-cdk/blob/main/CONTRIBUTING.md) and [DESIGN GUIDELINES](https://github.com/aws/aws-cdk/blob/main/docs/DESIGN_GUIDELINES.md)

----

*By submitting this pull request, I confirm that my contribution is made under the terms of the Apache-2.0 license*

.github/workflows/sync-from-upstream.yml

@@ -63,7 +63,7 @@ jobs:
         run: |-
           git remote add upstream https://github.com/aws/aws-cdk.git
           git fetch upstream $BRANCHES
-          git lfs fetch upstream
+          git lfs fetch --all upstream
 
           for branch in $BRANCHES; do
             git push origin --force refs/remotes/upstream/$branch:refs/heads/$branch