Update to latest tools release 2025.18.3.

Author: Laren-AWS

.github/workflows/validate-doc-metadata.yml

@@ -16,7 +16,7 @@ jobs:
       - name: checkout repo content
         uses: actions/checkout@v4
       - name: validate metadata
-        uses: awsdocs/aws-doc-sdk-examples-tools@2025.18.0
+        uses: awsdocs/aws-doc-sdk-examples-tools@2025.18.3
         with:
           doc_gen_only: "False"
           strict_titles: "True"