Upadted page switching

app.py

@@ -454,9 +454,9 @@ document.addEventListener("mouseup", () => {
     nav_bar = gr.Radio(
         choices=[
             "Text Generation",
-            "Question and Answer",
+            "Question Answering",
             "Summarisation",
-            "Image Generation"
+            "Text-to-Image",
         ],
         value="Text Generation",
         label="Topics",