chore(changelogs): update changelogs (#34826)

Co-authored-by: Lennart <[email protected]>

Author: gatsbybot

packages/gatsby-plugin-mdx/CHANGELOG.md

@@ -3,6 +3,12 @@
 All notable changes to this project will be documented in this file.
 See [Conventional Commits](https://conventionalcommits.org) for commit guidelines.
 
+### [3.7.1](https://github.com/gatsbyjs/gatsby/commits/[email protected]/packages/gatsby-plugin-mdx) (2022-02-15)
+
+#### Chores
+
+- Use MDX v1 for install instructions [#34774](https://github.com/gatsbyjs/gatsby/issues/34774) [#34817](https://github.com/gatsbyjs/gatsby/issues/34817) ([d149291](https://github.com/gatsbyjs/gatsby/commit/d1492917a4ed051de2f039c11e2b0ee36389f5a0))
+
 ## [3.7.0](https://github.com/gatsbyjs/gatsby/commits/[email protected]/packages/gatsby-plugin-mdx) (2022-02-08)
 
 [🧾 Release notes](https://www.gatsbyjs.com/docs/reference/release-notes/v4.7)

packages/gatsby/CHANGELOG.md

@@ -3,6 +3,12 @@
 All notable changes to this project will be documented in this file.
 See [Conventional Commits](https://conventionalcommits.org) for commit guidelines.
 
+### [4.7.2](https://github.com/gatsbyjs/gatsby/commits/[email protected]/packages/gatsby) (2022-02-15)
+
+#### Bug Fixes
+
+- Content Sync DSG bug [#34799](https://github.com/gatsbyjs/gatsby/issues/34799) [#34818](https://github.com/gatsbyjs/gatsby/issues/34818) ([7ef1fb6](https://github.com/gatsbyjs/gatsby/commit/7ef1fb6a3e6b75e74a41d545283dc0602dc9811e))
+
 ### [4.7.1](https://github.com/gatsbyjs/gatsby/commits/[email protected]/packages/gatsby) (2022-02-08)
 
 **Note:** Version bump only for package gatsby