nav update

Author: mitchpolygon

…k/getting-started/cdk-erigon/overview.md …/cdk/getting-started/cdk-erigon/index.mddocs/cdk/getting-started/cdk-erigon/overview.md renamed to docs/cdk/getting-started/cdk-erigon/index.md docs/cdk/getting-started/cdk-erigon/overview.md renamed to docs/cdk/getting-started/cdk-erigon/index.md

@@ -65,7 +65,7 @@ nav:
           - Local Deployment Guide: cdk/getting-started/local-deployment.md
           - CLI Tool: cdk/getting-started/cli-tool.md
           - CDK Erigon:
-            - Overview: cdk/getting-started/cdk-erigon/overview.md
+            - Overview: cdk/getting-started/cdk-erigon/index.md
             - Release: cdk/getting-started/cdk-erigon/release.md
             - Deploy a Node: cdk/getting-started/cdk-erigon/deploy-cdk-erigon.md
             - How To: