chore: fix typo (#5508)

Author: noritaka1166

test/e2e/__snapshots__/web-socket-server-url.test.js.snap.webpack5

@@ -589,25 +589,25 @@ exports[`web socket server URL should work with the "client.webSocketURL.protoco
 
 exports[`web socket server URL should work with the "client.webSocketURL.protocol" option using "auto:" value ("ws"): page errors 1`] = `[]`;
 
-exports[`web socket server URL should work with the "client.webSocketURL.protocol" option using "http:" value and covert to "ws:" ("sockjs"): console messages 1`] = `
+exports[`web socket server URL should work with the "client.webSocketURL.protocol" option using "http:" value and convert to "ws:" ("sockjs"): console messages 1`] = `
 [
   "[webpack-dev-server] Server started: Hot Module Replacement enabled, Live Reloading enabled, Progress disabled, Overlay enabled.",
   "[HMR] Waiting for update signal from WDS...",
   "Hey.",
 ]
 `;
 
-exports[`web socket server URL should work with the "client.webSocketURL.protocol" option using "http:" value and covert to "ws:" ("sockjs"): page errors 1`] = `[]`;
+exports[`web socket server URL should work with the "client.webSocketURL.protocol" option using "http:" value and convert to "ws:" ("sockjs"): page errors 1`] = `[]`;
 
-exports[`web socket server URL should work with the "client.webSocketURL.protocol" option using "http:" value and covert to "ws:" ("ws"): console messages 1`] = `
+exports[`web socket server URL should work with the "client.webSocketURL.protocol" option using "http:" value and convert to "ws:" ("ws"): console messages 1`] = `
 [
   "[webpack-dev-server] Server started: Hot Module Replacement enabled, Live Reloading enabled, Progress disabled, Overlay enabled.",
   "[HMR] Waiting for update signal from WDS...",
   "Hey.",
 ]
 `;
 
-exports[`web socket server URL should work with the "client.webSocketURL.protocol" option using "http:" value and covert to "ws:" ("ws"): page errors 1`] = `[]`;
+exports[`web socket server URL should work with the "client.webSocketURL.protocol" option using "http:" value and convert to "ws:" ("ws"): page errors 1`] = `[]`;
 
 exports[`web socket server URL should work with the "client.webSocketURL.username" and "client.webSocketURL.password" option ("sockjs"): console messages 1`] = `
 [

test/e2e/web-socket-server-url.test.js

@@ -570,7 +570,7 @@ describe("web socket server URL", () => {
       }
     });
 
-    it(`should work with the "client.webSocketURL.protocol" option using "http:" value and covert to "ws:" ("${webSocketServer}")`, async () => {
+    it(`should work with the "client.webSocketURL.protocol" option using "http:" value and convert to "ws:" ("${webSocketServer}")`, async () => {
       const compiler = webpack(config);
       const devServerOptions = {
         client: {