Bump graphql from 16.6.0 to 16.8.1

Bumps [graphql](https://github.com/graphql/graphql-js) from 16.6.0 to 16.8.1.
- [Release notes](https://github.com/graphql/graphql-js/releases)
- [Commits](graphql/graphql-js@v16.6.0...v16.8.1)

---
updated-dependencies:
- dependency-name: graphql
  dependency-type: direct:production
...

Signed-off-by: dependabot[bot] <support@github.com>

packages/sdk/package.json

@@ -30,7 +30,7 @@
     "@polkadot/api": "^10.9.1",
     "axios": "^0.24.0",
     "ethers": "~5.7.0",
-    "graphql": "^16.3.0",
+    "graphql": "^16.8.1",
     "graphql-request": "^4.1.0",
     "lodash": "^4.17.20",
     "lru-cache": "^7.14.1",

yarn.lock

@@ -176,7 +176,7 @@ __metadata:
     "@types/lru-cache": ^7.10.10
     axios: ^0.24.0
     ethers: ~5.7.0
-    graphql: ^16.3.0
+    graphql: ^16.8.1
     graphql-request: ^4.1.0
     lodash: ^4.17.20
     lru-cache: ^7.14.1
@@ -8070,10 +8070,10 @@ __metadata:
   languageName: node
   linkType: hard
 
-"graphql@npm:^16.3.0":
-  version: 16.6.0
-  resolution: "graphql@npm:16.6.0"
-  checksum: bf1d9e3c1938ce3c1a81e909bd3ead1ae4707c577f91cff1ca2eca474bfbc7873d5d7b942e1e9777ff5a8304421dba57a4b76d7a29eb19de8711cb70e3c2415e
+"graphql@npm:^16.8.1":
+  version: 16.8.1
+  resolution: "graphql@npm:16.8.1"
+  checksum: 8d304b7b6f708c8c5cc164b06e92467dfe36aff6d4f2cf31dd19c4c2905a0e7b89edac4b7e225871131fd24e21460836b369de0c06532644d15b461d55b1ccc0
   languageName: node
   linkType: hard