Bump gatsby-plugin-mdx from 2.0.0 to 2.0.1 (#591)

Bumps [gatsby-plugin-mdx](https://github.com/gatsbyjs/gatsby/tree/HEAD/packages/gatsby-plugin-mdx) from 2.0.0 to 2.0.1.
- [Release notes](https://github.com/gatsbyjs/gatsby/releases)
- [Changelog](https://github.com/gatsbyjs/gatsby/blob/gatsby-plugin-mdx@2.0.1/packages/gatsby-plugin-mdx/CHANGELOG.md)
- [Commits](https://github.com/gatsbyjs/gatsby/commits/gatsby-plugin-mdx@2.0.1/packages/gatsby-plugin-mdx)

Signed-off-by: dependabot[bot] <support@github.com>

Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

package.json

@@ -16,7 +16,7 @@
     "gatsby-image": "^3.0.0",
     "gatsby-plugin-feed": "^3.0.0",
     "gatsby-plugin-manifest": "^3.0.0",
-    "gatsby-plugin-mdx": "^2.0.0",
+    "gatsby-plugin-mdx": "^2.0.1",
     "gatsby-plugin-netlify": "^3.0.0",
     "gatsby-plugin-offline": "^4.0.0",
     "gatsby-plugin-plausible": "0.0.7",