Change tj-actions/changed-files usage from sha to latest version

Signed-off-by: Divya Madala <divyaasm@amazon.com>

Author: Divyaasm

.github/workflows/manifests.yml

@@ -19,7 +19,7 @@ jobs:
       - name: Checkout
         uses: actions/checkout@v3
       - name: Get changed manifest files
-        uses: tj-actions/changed-files@e9772d140489982e0e3704fea5ee93d536f1e275
+        uses: tj-actions/changed-files@2f7c5bfce28377bc069a65ba478de0a74aa0ca32
         id: list-changed-manifests
         with:
           files: manifests/**/opensearch*.yml