Fix MCP Redirect (#20926)

Author: rita3ko

public/_redirects

@@ -107,6 +107,8 @@
 /agents/examples/websockets/ /agents/api-reference/websockets/ 301
 /agents/examples/sdk/ /agents/api-reference/agents-api/ 301
 /agents/examples/build-mcp-server/ /agents/api-reference/build-mcp-server/ 301
+/agents/api-reference/build-mcp-server/ /agents/guides/build-mcp-server/ 301
+
 
 # ai
 /ai/ /use-cases/ai/ 301