chore(deps): update dependency rehype-mathjax to v7 (#13260)

Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>

Author: renovate[bot]

packages/integrations/mdx/package.json

@@ -62,7 +62,7 @@
     "mdast-util-mdx": "^3.0.0",
     "mdast-util-mdx-jsx": "^3.2.0",
     "mdast-util-to-string": "^4.0.0",
-    "rehype-mathjax": "^6.0.0",
+    "rehype-mathjax": "^7.1.0",
     "rehype-pretty-code": "^0.14.1",
     "remark-math": "^6.0.0",
     "remark-rehype": "^11.1.1",