Fix broken links

Signed-off-by: Dan Barr <[email protected]>

Author: danbarr

docs/toolhive/guides-cli/advanced-cicd.mdx

@@ -313,6 +313,6 @@ When implementing advanced CI/CD patterns:
 ## Related information
 
 - [Build MCP server containers](./build-containers.mdx)
-- [Run MCP servers in Kubernetes](../guides-k8s/run-mcp-k8s.mdx)
+- [Run MCP servers in Kubernetes](../guides-k8s/run-mcp-k8s.md)
 - [`thv build` command reference](../reference/cli/thv_build.md)
 - [Secrets management](./secrets-management.mdx)

docs/toolhive/guides-cli/build-containers.mdx

@@ -319,15 +319,15 @@ thv build --tag my-server:dev go:///path/to/my-project
 
 - Use built containers with [`thv run`](./run-mcp-servers.mdx) for local
   development
-- Deploy pre-built containers to [Kubernetes](../guides-k8s/run-mcp-k8s.mdx)
+- Deploy pre-built containers to [Kubernetes](../guides-k8s/run-mcp-k8s.md)
 - Set up [CI/CD pipelines](#cicd-integration) for automated building
 - Learn about [container registry workflows](#custom-image-tagging)
 
 ## Related information
 
 - [`thv build` command reference](../reference/cli/thv_build.md)
 - [Run MCP servers](./run-mcp-servers.mdx)
-- [Run MCP servers in Kubernetes](../guides-k8s/run-mcp-k8s.mdx)
+- [Run MCP servers in Kubernetes](../guides-k8s/run-mcp-k8s.md)
 - [Custom permissions](./custom-permissions.mdx)
 
 ## Troubleshooting