make survey a heading

Author: afeld

lecture_0.ipynb

@@ -151,14 +151,12 @@
    "metadata": {
     "editable": true,
     "slideshow": {
-     "slide_type": "subslide"
+     "slide_type": "slide"
     },
     "tags": []
    },
    "source": [
-    "### Who are you (as a whole)\n",
-    "\n",
-    "[Survey]({{survey_url}})"
+    "## [Survey]({{survey_url}})"
    ]
   },
   {
@@ -190,9 +188,11 @@
   {
    "cell_type": "markdown",
    "metadata": {
+    "editable": true,
     "slideshow": {
      "slide_type": "slide"
-    }
+    },
+    "tags": []
    },
    "source": [
     "## Politics/protests/war"