fix(deps): update dependency @portabletext/types to ^2.0.15

Author: renovate[bot]

package.json

@@ -70,7 +70,7 @@
   },
   "dependencies": {
     "@portabletext/toolkit": "^2.0.17",
-    "@portabletext/types": "^2.0.13"
+    "@portabletext/types": "^2.0.15"
   },
   "devDependencies": {
     "@changesets/changelog-github": "^0.5.1",