Bump gatsby-plugin-mdx from 1.0.68 to 1.0.69

Bumps [gatsby-plugin-mdx](https://github.com/gatsbyjs/gatsby/tree/HEAD/packages/gatsby-plugin-mdx) from 1.0.68 to 1.0.69.
- [Release notes](https://github.com/gatsbyjs/gatsby/releases)
- [Changelog](https://github.com/gatsbyjs/gatsby/blob/master/packages/gatsby-plugin-mdx/CHANGELOG.md)
- [Commits](https://github.com/gatsbyjs/gatsby/commits/[email protected]/packages/gatsby-plugin-mdx)

Signed-off-by: dependabot-preview[bot] <[email protected]>

Author: dependabot-preview[bot]

packages/www/package.json

@@ -13,7 +13,7 @@
     "gatsby-image": "^2.2.39",
     "gatsby-plugin-eslint": "^2.0.8",
     "gatsby-plugin-manifest": "^2.2.39",
-    "gatsby-plugin-mdx": "^1.0.68",
+    "gatsby-plugin-mdx": "^1.0.69",
     "gatsby-plugin-offline": "^3.0.33",
     "gatsby-plugin-react-helmet": "^3.1.21",
     "gatsby-plugin-sharp": "^2.4.3",

yarn.lock

@@ -8580,10 +8580,10 @@ gatsby-plugin-manifest@^2.2.39:
     semver "^5.7.1"
     sharp "^0.23.4"
 
-gatsby-plugin-mdx@^1.0.68:
-  version "1.0.68"
-  resolved "https://registry.yarnpkg.com/gatsby-plugin-mdx/-/gatsby-plugin-mdx-1.0.68.tgz#7e614cb31961006c9bb173f8f3cefcd459e43b26"
-  integrity sha512-wOf9CGweHUZ4EQu5UTIoFUR8bWIwQzRM7Og59DiyQLzIdKDfTR59qCE/PlK3mg07I6DG+YP27hM5zG7wU4LrGg==
+gatsby-plugin-mdx@^1.0.69:
+  version "1.0.69"
+  resolved "https://registry.yarnpkg.com/gatsby-plugin-mdx/-/gatsby-plugin-mdx-1.0.69.tgz#11b33a5478dd7ab005c8b093e402b4ccb1c122db"
+  integrity sha512-v3i9JFjtO0R+WYStpQozo0N8rL4kBtzW3TvljaCt6t1sPccS38++wV8kAUQH1mB6x267eXoc2o5NjLAY7YD1kQ==
   dependencies:
     "@babel/core" "^7.7.5"
     "@babel/generator" "^7.7.4"
@@ -8600,7 +8600,7 @@ gatsby-plugin-mdx@^1.0.68:
     escape-string-regexp "^1.0.5"
     eval "^0.1.4"
     fs-extra "^8.1.0"
-    gatsby-core-utils "^1.0.26"
+    gatsby-core-utils "^1.0.27"
     gray-matter "^4.0.2"
     json5 "^2.1.1"
     loader-utils "^1.2.3"