alternate css for bold tab names

app.py

@@ -20,7 +20,7 @@ from utils import download_hf_models
 
 css = """
 /* Make only the active tab bold */
-button[data-testid="block-tabs-tab"][aria-selected="true"] {
+.svelte-1uw5tnk[aria-selected="true"] {
     font-weight: bold;
 }
 """