build(deps): Bump @octokit/graphql-schema from 15.12.0 to 15.20.0

Bumps [@octokit/graphql-schema](https://github.com/octokit/graphql-schema) from 15.12.0 to 15.20.0.
- [Release notes](https://github.com/octokit/graphql-schema/releases)
- [Commits](https://github.com/octokit/graphql-schema/compare/v15.12.0...v15.20.0)

---
updated-dependencies:
- dependency-name: "@octokit/graphql-schema"
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

package.json

@@ -29,7 +29,7 @@
     "@actions/core": "^1.10.1",
     "@actions/github": "^6.0.0",
     "@actions/glob": "^0.4.0",
-    "@octokit/graphql-schema": "^15.12.0"
+    "@octokit/graphql-schema": "^15.20.0"
   },
   "devDependencies": {
     "@types/jest": "^29.5.11",

yarn.lock

@@ -1012,10 +1012,10 @@
     is-plain-object "^5.0.0"
     universal-user-agent "^6.0.0"
 
-"@octokit/graphql-schema@^15.12.0":
-  version "15.12.0"
-  resolved "https://registry.yarnpkg.com/@octokit/graphql-schema/-/graphql-schema-15.12.0.tgz#2b28efca16684fd5d30ebdb8605a07b13a6b737c"
-  integrity sha512-YiONgXzmQi4MVQBdJsCF7fgSAhnZySstDchw9bxkBYJRwNVwpwz7fjmOQVJbvIpqKtJ0vpZMgodZj3A3L9YwDw==
+"@octokit/graphql-schema@^15.20.0":
+  version "15.20.0"
+  resolved "https://registry.yarnpkg.com/@octokit/graphql-schema/-/graphql-schema-15.20.0.tgz#aaf43a74c114960be0d39aad31a12a57eedd7b6a"
+  integrity sha512-N8hLNtVPyN+Dv0uODcmsa1YiTBABXobWz7424PznYJmhDJkfEIZTsKA22HJevSj7L3MIVX3vUnhHV7Z3oHO09Q==
   dependencies:
     graphql "^16.0.0"
     graphql-tag "^2.10.3"