chore(deps): update dependency classnames to v2.3.1

Author: renovate-bot

package.json

@@ -11,7 +11,7 @@
   "dependencies": {
     "@mdx-js/mdx": "1.6.18",
     "@mdx-js/react": "1.6.18",
-    "classnames": "2.2.6",
+    "classnames": "2.3.1",
     "gatsby": "2.24.68",
     "gatsby-image": "2.4.21",
     "gatsby-plugin-mdx": "1.2.44",

yarn.lock

@@ -3979,10 +3979,10 @@ class-utils@^0.3.5:
     isobject "^3.0.0"
     static-extend "^0.1.1"
 
-classnames@2.2.6:
-  version "2.2.6"
-  resolved "https://registry.yarnpkg.com/classnames/-/classnames-2.2.6.tgz#43935bffdd291f326dad0a205309b38d00f650ce"
-  integrity sha512-JR/iSQOSt+LQIWwrwEzJ9uk0xfN3mTVYMwt1Ir5mUcSN6pU+V4zQFFaJsclJbPuAUQH+yfWef6tm7l1quW3C8Q==
+classnames@2.3.1:
+  version "2.3.1"
+  resolved "https://registry.yarnpkg.com/classnames/-/classnames-2.3.1.tgz#dfcfa3891e306ec1dad105d0e88f4417b8535e8e"
+  integrity sha512-OlQdbZ7gLfGarSqxesMesDa5uz7KFbID8Kpq/SxIoNGDqY8lSYs0D+hhtBXhcdB3rcbXArFr7vlHheLk1voeNA==
 
 clean-stack@^2.0.0:
   version "2.2.0"