Fix typo in error message in flutter doctor (#58421)

packages/flutter_tools/lib/src/base/user_messages.dart

@@ -98,7 +98,7 @@ class UserMessages {
       'Android license status unknown.\n'
       'Try re-installing or updating your Android SDK Manager.\n'
       'See https://developer.android.com/studio/#downloads or visit '
-      'visit ${_androidSdkInstallUrl(platform)} for detailed instructions.';
+      '${_androidSdkInstallUrl(platform)} for detailed instructions.';
   String androidSdkManagerOutdated(String managerPath) =>
       'A newer version of the Android SDK is required. To update, run:\n'
       '$managerPath --update\n';