fix: update error message

Author: jsjoeio

test/unit/node/app.test.ts

@@ -271,7 +271,7 @@ describe("listen", () => {
   })
 
   it("should throw an error if a directory is passed in instead of a file", async () => {
-    const errorMessage = "EPERM: operation not permitted, unlink"
+    const errorMessage = "EISDIR: illegal operation on a directory, unlink"
     const port = await getAvailablePort()
     const mockArgs = { port, host: "0.0.0.0", socket: tmpDirPath }