Update app.py

Changed the **Source** from **Booru Image Fetcher** as the default decided to not work anymore.

app.py

@@ -579,7 +579,7 @@ with gr.Blocks(title=TITLE, css=css, theme=gr.themes.Soft(), fill_width=True) as
         with gr.Row():
             with gr.Column():
                 gr.Markdown("### ⚙️ Search Parameters")
-                site = gr.Dropdown(label="Select Source", choices=["Gelbooru", "Rule34", "Xbooru"], value="Gelbooru")
+                site = gr.Dropdown(label="Select Source", choices=["Gelbooru", "Rule34", "Xbooru"], value="Xbooru")
                 Tags = gr.Textbox(label="Tags (comma-separated)", placeholder="e.g. solo, 1girl, 1boy, artist name, character, black hair, granblue fantasy, ...")
                 exclude_tags = gr.Textbox(label="Exclude Tags (comma-separated)", placeholder="e.g. animated, watermark, username, ...")
                 score = gr.Number(label="Minimum Score", value=0)