Make sure DevEx can approve docs PRs / Remove Spaces (#51996)

.github/CODEOWNERS

@@ -3,15 +3,16 @@
 
 
 *                                             @timneutkens @ijjk @shuding @huozhi @feedthejim
-/.git*                                        @vercel/next-js
-/docs/                                        @vercel/next-js @leerob
-/errors/                                      @vercel/next-js @leerob
-/examples/                                    @vercel/next-js @leerob @steven-tey
+/.git*                                        @vercel/next-js @vercel/devex
+/docs/                                        @vercel/next-js @vercel/devex
+/errors/                                      @vercel/next-js @vercel/devex
+/examples/                                    @vercel/next-js @vercel/devex
 /scripts/                                     @vercel/next-js
 /.alex*                                       @vercel/next-js @leerob
 /.eslint*                                     @vercel/next-js @leerob
 /.prettier*                                   @vercel/next-js @leerob
-/*.md                                         @vercel/next-js @leerob
+/*.md                                         @vercel/next-js @vercel/devex
+/*.mdx                                        @vercel/next-js @vercel/devex
 /packages/create-next-app/                    @vercel/next-js
 /pnpm-lock.yaml                               @vercel/next-js @vercel/web-tooling