fix(deps): pin dependency @mdx-js/react to 1.6.22 (#147)

Co-authored-by: Renovate Bot <[email protected]>

Author: renovate[bot]

docs/package-lock.json

@@ -17,7 +17,7 @@
     "@docusaurus/core": "2.0.0-beta.3",
     "@docusaurus/preset-classic": "2.0.0-beta.3",
     "@docusaurus/theme-search-algolia": "^2.0.0-beta.3",
-    "@mdx-js/react": "^1.6.21",
+    "@mdx-js/react": "1.6.22",
     "@svgr/webpack": "^5.5.0",
     "clsx": "^1.1.1",
     "file-loader": "^6.2.0",