fix: update aws-credentials action version comment to v6.1.1

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

Author: dvdksn

.github/workflows/nightly-docs-scan.yml

@@ -50,7 +50,7 @@ jobs:
       - name: Configure AWS credentials
         id: aws-credentials
         continue-on-error: true
-        uses: aws-actions/configure-aws-credentials@d979d5b3a71173a29b74b5b88418bfda9437d885 # v4
+        uses: aws-actions/configure-aws-credentials@d979d5b3a71173a29b74b5b88418bfda9437d885 # v6.1.1
         with:
           role-to-assume: arn:aws:iam::710015040892:role/docker-agent-action-20260409141318957000000001
           aws-region: us-east-1