Update Bedrock Runtime client to support Material for MkDocs

Author: arandito

clients/aws-sdk-bedrock-runtime/docs/Makefile

@@ -1,10 +1,15 @@
 ## Generating Documentation
 
-Sphinx is used for documentation. You can generate HTML locally with the
+Material for MkDocs is used for documentation. You can generate HTML locally with the
 following:
 
-```
-$ uv pip install --group docs .
-$ cd docs
-$ make html
+```bash
+# Install documentation dependencies
+uv pip install --group docs
+
+# Serve documentation locally
+mkdocs serve
+
+# OR build static HTML documentation
+mkdocs build
 ```