LibGUI: Add set_text(String) method to ProgressBar

Author: https://github.com/mrunix00
Commit: https://github.com/SerenityOS/serenity/commit/4cb2ff1428
Pull-request: https://github.com/SerenityOS/serenity/pull/22442
Reviewed-by: https://github.com/ADKaster ✅

Userland/Libraries/LibGUI/Progressbar.h

@@ -30,6 +30,7 @@ public:
 
     ByteString text() const { return m_text; }
     void set_text(ByteString text) { m_text = move(text); }
+    void set_text(String const& text) { m_text = ByteString(text); }
 
     enum Format {
         NoText,