fix: next-mdx-remote related dependabot alerts (#18244)

Resolves [Dependabot Alert
485](https://github.com/twentyhq/twenty/security/dependabot/485) and
[Dependabot Alert
486](https://github.com/twentyhq/twenty/security/dependabot/486).

Bumped up `next-mdx-remote` to v6.0.0 and `remark-gfm` to v4.0.1 for
compatibility - no breaking changes for our use-case.

package.json

@@ -48,7 +48,7 @@
     "react-responsive": "^9.0.2",
     "react-router-dom": "^6.4.4",
     "react-tooltip": "^5.13.1",
-    "remark-gfm": "^3.0.1",
+    "remark-gfm": "^4.0.1",
     "rxjs": "^7.2.0",
     "semver": "^7.5.4",
     "slash": "^5.1.0",

packages/twenty-website/package.json

@@ -24,7 +24,7 @@
     "facepaint": "^1.2.1",
     "gray-matter": "^4.0.3",
     "next": "^14.2.25",
-    "next-mdx-remote": "^4.4.1",
+    "next-mdx-remote": "^6.0.0",
     "next-runtime-env": "^3.3.0",
     "postgres": "^3.4.3",
     "react-tooltip": "^5.13.1",