Update dependency vitepress to v1.4.0 (#513)

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

Author: renovate[bot]

package.json

@@ -94,7 +94,7 @@
     "tsup": "8.3.0",
     "typescript": "5.6.3",
     "vite": "5.4.3",
-    "vitepress": "1.3.4",
+    "vitepress": "1.4.0",
     "vitest": "2.1.2"
   },
   "peerDependencies": {