Use circle (#41)

Author: tcmetzger

notebooks/06_data_sources.ipynb

@@ -423,7 +423,7 @@
     "\n",
     "p = figure(height=300)\n",
     "\n",
-    "p.scatter(\n",
+    "p.circle(\n",
     "    x=\"x\",\n",
     "    y=\"y\",\n",
     "    radius=\"r\",\n",