freeze: add --language for linux test

Signed-off-by: Rui Chen <rui@chenrui.dev>

Author: chenrui333

Formula/f/freeze.rb

@@ -24,7 +24,7 @@ def install
       }
     GO
 
-    system bin/"freeze", "hello.go", "-o", "hello.png"
+    system bin/"freeze", "hello.go", "--language", "go", "--output", "hello.png"
     assert_path_exists testpath/"hello.png"
   end
 end