ci: fix conditional expression in check-links workflow

Author: Manvi2402

.github/workflows/check-links.yml

@@ -26,9 +26,12 @@ jobs:
   check-links:
     runs-on: ubuntu-latest
     needs: changedfiles
-    if: |
-      github.event.pull_request.user.login != 'otelbot[bot]' && github.event_name == 'pull_request'
-      && ${{needs.changedfiles.outputs.md}}
+    if: >-
+     ${{
+       github.event.pull_request.user.login != 'otelbot[bot]' &&
+       github.event_name == 'pull_request' &&
+       needs.changedfiles.outputs.md
+     }}
     steps:
       - name: Checkout Repo
         uses: actions/checkout@v4
@@ -43,5 +46,5 @@ jobs:
           markdown-link-check \
             --verbose \
             --config .github/workflows/check_links_config.json \
-            ${{needs.changedfiles.outputs.md}} \
+            ${{ needs.changedfiles.outputs.md }} \
             || { echo "Check that anchor links are lowercase"; exit 1; }