Bump CI Node version to 22 (#720)

Node 20 is end-of-life and receives no security fixes, including the
2026-10-21 Brotli decoder fix (CVE-2026-111497). Pin the major to the
supported 22 line, which resolves to patched releases.

Co-authored-by: ulziibay-kernel <253135130+ulziibay-kernel@users.noreply.github.com>

Author: ulziibay-kernel

.github/workflows/broken-links.yml

@@ -13,7 +13,7 @@ jobs:
 
       - uses: actions/setup-node@v4
         with:
-          node-version: "20"
+          node-version: "22"
 
       - name: Install Mintlify CLI
         # Pinned: 4.2.931 can't install, its @mintlify/auth-edge dependency is unpublished