test: fix test-http2-socket-close.js

Fixes: #54819
PR-URL: #54900
Reviewed-By: Luigi Pinca <[email protected]>
Reviewed-By: Richard Lau <[email protected]>

Author: huseyinacacak-janea

test/parallel/test-http2-socket-close.js

@@ -42,6 +42,7 @@ netServer.listen(0, common.mustCall(() => {
     rejectUnauthorized: false
   });
 
+  proxyClient.on('error', () => {});
   proxyClient.on('close', common.mustCall(() => {
     netServer.close();
   }));
@@ -51,6 +52,7 @@ netServer.listen(0, common.mustCall(() => {
     ':path': '/'
   });
 
+  req.on('error', () => {});
   req.on('response', common.mustCall((response) => {
     assert.strictEqual(response[':status'], 200);