chore(deps): update dependency graphql to ^16.8.1 (#38509)

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

Author: renovate[bot]

packages/gatsby/package.json

@@ -259,7 +259,7 @@
     "url": "git+https://github.com/gatsbyjs/gatsby.git"
   },
   "resolutions": {
-    "graphql": "^16.7.1"
+    "graphql": "^16.8.1"
   },
   "scripts": {
     "build": "npm run build:types && npm run build:src && npm run build:internal-plugins && npm run build:rawfiles && npm run build:cjs",