fix(deps): update dependency rehype-react to v8

Author: renovate[bot]

packages/gatsby-theme-iterative/package.json

@@ -60,7 +60,7 @@
     "react-intersection-observer": "^9.5.2",
     "react-use": "^17.3.2",
     "rehype-parse": "^8.0.4",
-    "rehype-react": "^7.0.4",
+    "rehype-react": "^8.0.0",
     "rehype-stringify": "^9.0.3",
     "remark": "^14.0.3",
     "remark-html": "^15.0.1",