Apply suggestion to update metadata for how-to guide.

Co-authored-by: Jon Torre <[email protected]>

Author: nginx-seanmoloney

content/agent/how-to/run-agent-container.md

@@ -1,7 +1,9 @@
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 title: "Running the NGINX Agent in a Container"
 weight: 300
-docs: DOCS-000
+toc: true
+type: how-to
+product: Agent
 ---
 
 ## Overview