fix: comment file link to new file

Author: NikolaiSviridov

src/CodexAcpClient.ts

@@ -325,7 +325,7 @@ export class CodexAcpClient {
 
     // Makes an ACP-provided MCP server durable so Codex core can append
     // mcp_servers.<server>.tools.<tool>.approval_mode afterward:
-    // https://github.com/openai/codex/blob/main/codex-rs/app-server/src/config_api.rs
+    // https://github.com/openai/codex/blob/main/codex-rs/core/src/mcp_tool_call.rs
     async persistMcpServer(mcpServer: McpServer): Promise<void> {
         const edits: ConfigEdit[] = [{
             keyPath: `mcp_servers.${mcpServer.name}`,