Update pkgs/http/lib/src/browser_client.dart

Maybe yes!. :)

Co-authored-by: Kevin Moore <[email protected]>

Author: seifibrahim32

pkgs/http/lib/src/browser_client.dart

@@ -51,8 +51,7 @@ class BrowserClient extends BaseClient {
   ///
   /// For example:
   /// ```dart
-  /// const mode = 'reload';
-  /// final client = BrowserClient(cacheMode: mode);
+  /// final client = BrowserClient(cacheMode: 'reload');
   /// ```
   BrowserClient({this.cacheMode = 'default'});