Add Codacy AI to Navigation (#2503)

Author: heliocodacy

mkdocs.yml

@@ -569,6 +569,8 @@ nav:
           - codacy-guardrails/codacy-guardrails-limitations.md
           - codacy-guardrails/codacy-guardrails-troubleshooting.md
           - codacy-guardrails/codacy-guardrails-faq.md
+    - Codacy AI:
+          - codacy-ai/codacy-ai.md
     - Repositories on Codacy:
           - repositories/repository-dashboard.md
           - repositories/commits.md