Fix MDX import and export parsing (#17996)

Co-authored-by: fisker <lionkay@gmail.com>
Co-authored-by: autofix-ci[bot] <114827586+autofix-ci[bot]@users.noreply.github.com>

changelog_unreleased/mdx/17996.md

@@ -0,0 +1,18 @@
+#### Fix `import` and `export` parsing (#17996 by @kovsu & @fisker)
+
+<!-- prettier-ignore -->
+```mdx
+{/* Input */}
+- import is a word in lists
+- export is a word in lists, too!
+
+{/* Prettier stable */}
+- import is a word in list
+  s
+- export is a word in lists, too
+  !
+
+{/* Prettier main */}
+- import is a word in lists
+- export is a word in lists, too!
+```