test(@angular/cli): update Webpack 5 E2E test to 5.1.0

Author: clydin

tests/legacy-cli/e2e/tests/misc/webpack-5.ts

@@ -6,7 +6,7 @@ export default async function() {
   // Setup project for yarn usage
   await rimraf('node_modules');
   await updateJsonFile('package.json', (json) => {
-    json.resolutions = { webpack: '5.0.0-rc.3' };
+    json.resolutions = { webpack: '5.1.0' };
   });
   await silentYarn();
   await silentYarn('webdriver-update');