Update footer variables

docs/_data/variables/layout/footer.json

@@ -7,6 +7,11 @@
       "computed_type": "color",
       "computed_value": "hsl(0, 0%, 98%)"
     },
+    "$footer-color": {
+      "name": "$footer-color",
+      "value": "false",
+      "type": "boolean"
+    },
     "$footer-padding": {
       "name": "$footer-padding",
       "value": "3rem 1.5rem 6rem",
@@ -15,6 +20,7 @@
   },
   "list": [
     "$footer-background-color",
+    "$footer-color",
     "$footer-padding"
   ],
   "file_path": "layout/footer.sass"