Make deprecation notice link to website downloads (#63829)

packages/flutter_tools/lib/src/runner/flutter_command.dart

@@ -795,7 +795,9 @@ abstract class FlutterCommand extends Command<void> {
   void _printDeprecationWarning() {
     if (deprecated) {
       globals.printStatus('$warningMark The "$name" command is deprecated and '
-          'will be removed in a future version of Flutter.');
+          'will be removed in a future version of Flutter. '
+          'See https://flutter.dev/docs/development/tools/sdk/releases '
+          'for previous releases of Flutter.');
       globals.printStatus('');
     }
   }

packages/flutter_tools/test/commands.shard/hermetic/version_test.dart

@@ -43,7 +43,10 @@ void main() {
         '--no-pub',
       ]);
       expect(testLogger.statusText, equals(
-        '[!] The "version" command is deprecated and will be removed in a future version of Flutter.\n\n'
+        '[!] The "version" command is deprecated '
+            'and will be removed in a future version of Flutter. '
+            'See https://flutter.dev/docs/development/tools/sdk/releases '
+            'for previous releases of Flutter.\n\n'
         'v10.0.0\r\nv20.0.0\r\n30.0.0-dev.0.0\r\n31.0.0-0.0.pre\n'
       ));
     }, overrides: <Type, Generator>{