fix: graphql uncontrolled resource consumption vulnerability (#15260)

Fixes [Dependabot Alert
73](https://github.com/twentyhq/twenty/security/dependabot/73) - graphql
uncontrolled resource consumption vulnerability.

Updated the patch version - from 16.8.0 to 16.8.1 - and this patch only
touches the issue identified by the alert.

<p align="center">
<img width="1175" height="472" alt="image"
src="https://github.com/user-attachments/assets/4f809f03-1e63-4412-822c-227712d1e395"
/>
</p>

Manually tested a few mutations, ran test cases, and everything seems to
work fine. Not expecting it to break anything.

Two files changed in the original patch fix:
https://github.com/graphql/graphql-js/commit/8f4c64eb6a7112a929ffeef00caa67529b3f2fcf

package.json

@@ -217,7 +217,7 @@
   "name": "twenty",
   "packageManager": "yarn@4.9.2",
   "resolutions": {
-    "graphql": "16.8.0",
+    "graphql": "16.8.1",
     "type-fest": "4.10.1",
     "typescript": "5.9.2",
     "graphql-redis-subscriptions/ioredis": "^5.6.0",