chore(deps): bump gatsby-plugin-mdx from 1.1.4 to 1.1.7

Bumps [gatsby-plugin-mdx](https://github.com/gatsbyjs/gatsby/tree/HEAD/packages/gatsby-plugin-mdx) from 1.1.4 to 1.1.7.
- [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]

yarn.lock

@@ -11420,9 +11420,9 @@ gatsby-plugin-google-fonts@^1.0.0:
   integrity sha512-p1NVkn27GUnDA5qHM+Z4cCcLCJIardzZXMon3640sT4xuL/AZJbsx3HEt2KY/5oZu0UXIkytkxzV2Da4rQeUIg==
 
 gatsby-plugin-mdx@^1.0.4, gatsby-plugin-mdx@^1.0.83:
-  version "1.1.4"
-  resolved "https://registry.yarnpkg.com/gatsby-plugin-mdx/-/gatsby-plugin-mdx-1.1.4.tgz#1f3e9773bfc1fd4806ceacab7a130441f3e19b0d"
-  integrity sha512-id2/LALN7eseTGN05v1n16XCYggrl2UTzWOJOQME9rh25jNK+KT5ywaPY6vNYimeAW7wWdad3rl6hORpv4L6yw==
+  version "1.1.7"
+  resolved "https://registry.yarnpkg.com/gatsby-plugin-mdx/-/gatsby-plugin-mdx-1.1.7.tgz#af94eff3f10ae2475ac0714b08f3e97d0fc77b0f"
+  integrity sha512-CTEeZQQ/hYDPv9mX06259zwiQc67OGBPzigBL8ZEMSgg5ANzzfR143Wd74RGPvT04GnMNjfWKcg8yBPTf75EaA==
   dependencies:
     "@babel/core" "^7.8.7"
     "@babel/generator" "^7.8.8"