Increase glyph size for floating UI examples (#40)

Author: pavithraes

notebooks/11_widgets_interactivity.ipynb

@@ -977,7 +977,7 @@
     "    # Generate plot data\n",
     "    x = np.random.random(size=N) * 100\n",
     "    y = np.random.random(size=N) * 100\n",
-    "    radii = np.random.random(size=N) * 1.5\n",
+    "    radii = np.random.random(size=N) * 15\n",
     "    colors = np.random.choice(Spectral11, size=N)\n",
     "\n",
     "    # Create the plot\n",