Replace flutter.io with flutter.dev (#30562)

diff --git a/packages/flutter_tools/lib/src/commands/create.dart b/packages/flutter_tools/lib/src/commands/create.dart
index 17fffae..5118df7 100644
--- a/packages/flutter_tools/lib/src/commands/create.dart
+++ b/packages/flutter_tools/lib/src/commands/create.dart
@@ -407,7 +407,7 @@
 Your plugin code is in $relativePluginMain.
 
 Host platform code is in the "android" and "ios" directories under $relativePluginPath.
-To edit platform code in an IDE see https://flutter.io/developing-packages/#edit-plugin-package.
+To edit platform code in an IDE see https://flutter.dev/developing-packages/#edit-plugin-package.
 ''');
         }
       } else {
diff --git a/packages/flutter_tools/lib/src/commands/devices.dart b/packages/flutter_tools/lib/src/commands/devices.dart
index 78effffd..904b055 100644
--- a/packages/flutter_tools/lib/src/commands/devices.dart
+++ b/packages/flutter_tools/lib/src/commands/devices.dart
@@ -34,7 +34,7 @@
         'No devices detected.\n\n'
         "Run 'flutter emulators' to list and start any available device emulators.\n\n"
         'Or, if you expected your device to be detected, please run "flutter doctor" to diagnose '
-        'potential issues, or visit https://flutter.io/setup/ for troubleshooting tips.');
+        'potential issues, or visit https://flutter.dev/setup/ for troubleshooting tips.');
       final List<String> diagnostics = await deviceManager.getDeviceDiagnostics();
       if (diagnostics.isNotEmpty) {
         printStatus('');
diff --git a/packages/flutter_tools/lib/src/commands/emulators.dart b/packages/flutter_tools/lib/src/commands/emulators.dart
index 471a26d..53492a2 100644
--- a/packages/flutter_tools/lib/src/commands/emulators.dart
+++ b/packages/flutter_tools/lib/src/commands/emulators.dart
@@ -135,7 +135,7 @@
     if (showRunInstruction || showCreateInstruction) {
       printStatus('');
     }
-    // TODO(dantup): Update this link to flutter.io if/when we have a better page.
+    // TODO(dantup): Update this link to flutter.dev if/when we have a better page.
     // That page can then link out to these places if required.
     printStatus('You can find more information on managing emulators at the links below:\n'
         '  https://developer.android.com/studio/run/managing-avds\n'
diff --git a/packages/flutter_tools/lib/src/commands/run.dart b/packages/flutter_tools/lib/src/commands/run.dart
index e72ae1a..00c2792 100644
--- a/packages/flutter_tools/lib/src/commands/run.dart
+++ b/packages/flutter_tools/lib/src/commands/run.dart
@@ -215,7 +215,7 @@
       printStatus("Run 'flutter emulators' to list and start any available device emulators.");
       printStatus('');
       printStatus('If you expected your device to be detected, please run "flutter doctor" to diagnose');
-      printStatus('potential issues, or visit https://flutter.io/setup/ for troubleshooting tips.');
+      printStatus('potential issues, or visit https://flutter.dev/setup/ for troubleshooting tips.');
     }
   }