Update to @emotion 11

website/package.json

@@ -14,9 +14,9 @@
   "homepage": "https://www.netlifycms.org/",
   "license": "MIT",
   "dependencies": {
-    "@emotion/cache": "^10.0.29",
-    "@emotion/core": "^10.0.35",
-    "@emotion/styled": "^10.0.27",
+    "@emotion/cache": "11.10.3",
+    "@emotion/core": "11.0.0",
+    "@emotion/styled": "11.10.4",
     "dayjs": "^1.8.23",
     "emotion-theming": "^10.0.27",
     "gatsby": "3.14.6",