fix(deps): update dependency netlify-cms-ui-default to ^2.15.0

Author: renovate-bot

package.json

@@ -33,7 +33,7 @@
   "dependencies": {
     "@emotion/core": "^10.0.35",
     "@emotion/styled": "^10.0.27",
-    "netlify-cms-ui-default": "^2.14.0",
+    "netlify-cms-ui-default": "^2.15.0",
     "react": "^16.8.4",
     "react-dom": "^16.8.4",
     "react-select": "^3.1.0",

yarn.lock

@@ -5500,10 +5500,10 @@ neo-async@^2.6.2:
   resolved "https://registry.yarnpkg.com/neo-async/-/neo-async-2.6.2.tgz#b4aafb93e3aeb2d8174ca53cf163ab7d7308305f"
   integrity sha512-Yd3UES5mWCSqR+qNT93S3UoYUkqAZ9lLg8a7g9rimsWmYGK8cVToA4/sF3RrshdyV3sAGMXVUmpMYOw+dLpOuw==
 
-netlify-cms-ui-default@^2.14.0:
-  version "2.14.0"
-  resolved "https://registry.yarnpkg.com/netlify-cms-ui-default/-/netlify-cms-ui-default-2.14.0.tgz#9cfcd177b4ab555651722db96e86058bed5ef2cd"
-  integrity sha512-8TBYukdwr1nM/vz9xZy8F6KHZIRAPvWDS2c2QzXi5fyX7faO7cq/84QdPC+q5GXlbwg6FhyhqDfi3KisnVcAEw==
+netlify-cms-ui-default@^2.15.0:
+  version "2.15.0"
+  resolved "https://registry.yarnpkg.com/netlify-cms-ui-default/-/netlify-cms-ui-default-2.15.0.tgz#d29754874c64c01f6ec6c6a67d43020f5882d920"
+  integrity sha512-iVls+H1d3rzu6UUmw12090RNpM4qkdN5PR0/kZJHwSySepaVA1usZQhO46v5VXrw+LaRXoNq2YAETmNK7ztBWw==
   dependencies:
     react-aria-menubutton "^7.0.0"
     react-toggled "^1.1.2"