Bump graphql from 15.5.0 to 15.6.1 (#7293)

Bumps [graphql](https://github.com/graphql/graphql-js) from 15.5.0 to 15.6.1.
- [Release notes](https://github.com/graphql/graphql-js/releases)
- [Commits](https://github.com/graphql/graphql-js/compare/v15.5.0...v15.6.1)

---
updated-dependencies:
- dependency-name: graphql
  dependency-type: direct:development
  update-type: version-update:semver-minor
...

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Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

package.json

@@ -138,7 +138,7 @@
     "css-loader": "^5.2.6",
     "dotenv": "^8.2.0",
     "github-api": "^3.4.0",
-    "graphql": "^15.4.0",
+    "graphql": "^15.6.1",
     "graphql-request": "^3.1.0",
     "husky": "^7.0.1",
     "jasmine-ajax": "4.0.0",