chore(deps): update sanity monorepo to ^3.91.0 (#75)

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

Author: renovate[bot]

packages/sanity-sveltekit/package.json

@@ -43,7 +43,7 @@
   "devDependencies": {
     "@eslint/compat": "^1.2.9",
     "@eslint/js": "^9.28.0",
-    "@sanity/types": "^3.90.0",
+    "@sanity/types": "^3.91.0",
     "@sveltejs/adapter-auto": "^6.0.1",
     "@sveltejs/kit": "^2.21.2",
     "@sveltejs/package": "^2.3.11",
@@ -68,7 +68,7 @@
     "@sanity/preview-url-secret": "^2.1.11",
     "@sanity/visual-editing": "^2.15.0",
     "fast-deep-equal": "^3.1.3",
-    "sanity": "^3.90.0"
+    "sanity": "^3.91.0"
   },
   "publishConfig": {
     "access": "public"