Bump graphql from 15.5.1 to 15.6.0

Bumps [graphql](https://github.com/graphql/graphql-js) from 15.5.1 to 15.6.0.
- [Release notes](https://github.com/graphql/graphql-js/releases)
- [Commits](graphql/graphql-js@v15.5.1...v15.6.0)

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

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]

package-lock.json

@@ -16,7 +16,7 @@
     "@types/react": "^17.0.26",
     "algoliasearch": "^4.10.5",
     "autoprefixer": "^10.3.6",
-    "graphql": "^15.5.1",
+    "graphql": "^15.6.0",
     "next": "^11.1.2",
     "node-fetch": "^2.6.1",
     "nprogress": "^0.2.0",