build(deps): bump gatsby-source-filesystem in /docs

Bumps [gatsby-source-filesystem](https://github.com/gatsbyjs/gatsby/tree/HEAD/packages/gatsby-source-filesystem) from 2.11.0 to 2.11.1.
- [Release notes](https://github.com/gatsbyjs/gatsby/releases)
- [Changelog](https://github.com/gatsbyjs/gatsby/blob/gatsby-source-filesystem@2.11.1/packages/gatsby-source-filesystem/CHANGELOG.md)
- [Commits](https://github.com/gatsbyjs/gatsby/commits/gatsby-source-filesystem@2.11.1/packages/gatsby-source-filesystem)

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

docs/package.json

@@ -18,7 +18,7 @@
     "gatsby-plugin-emotion": "^4.3.10",
     "gatsby-plugin-google-analytics": "^2.11.0",
     "gatsby-plugin-manifest": "^2.12.0",
-    "gatsby-plugin-mdx": "^1.10.0",
+    "gatsby-plugin-mdx": "^1.10.1",
     "gatsby-plugin-netlify": "^2.11.0",
     "gatsby-plugin-netlify-cache": "^1.2.0",
     "gatsby-plugin-offline": "^3.10.0",
@@ -34,7 +34,7 @@
     "gatsby-remark-images": "^3.11.1",
     "gatsby-remark-mermaid": "^2.1.0",
     "gatsby-remark-responsive-iframe": "^2.11.0",
-    "gatsby-source-filesystem": "^2.11.0",
+    "gatsby-source-filesystem": "^2.11.1",
     "gatsby-transformer-remark": "^2.16.0",
     "gatsby-transformer-sharp": "^2.12.0",
     "gatsby-transformer-yaml": "^2.11.0",