Bump graphql from 14.2.1 to 14.3.0 in /backend

Bumps [graphql](https://github.com/graphql/graphql-js) from 14.2.1 to 14.3.0.
- [Release notes](https://github.com/graphql/graphql-js/releases)
- [Commits](graphql/graphql-js@v14.2.1...v14.3.0)

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

backend/package.json

@@ -48,7 +48,7 @@
     "dotenv": "~8.0.0",
     "express": "~4.16.4",
     "faker": "~4.1.0",
-    "graphql": "~14.2.1",
+    "graphql": "~14.3.0",
     "graphql-custom-directives": "~0.2.14",
     "graphql-iso-date": "~3.6.1",
     "graphql-middleware": "~3.0.2",

backend/yarn.lock

@@ -3949,10 +3949,10 @@ graphql-yoga@~1.17.4:
     graphql-tools "^4.0.0"
     subscriptions-transport-ws "^0.9.8"
 
-"graphql@^0.11.0 || ^0.12.0 || ^0.13.0 || ^14.0.0", graphql@^14.0.2, graphql@~14.2.1:
-  version "14.2.1"
-  resolved "https://registry.yarnpkg.com/graphql/-/graphql-14.2.1.tgz#779529bf9a01e7207b977a54c20670b48ca6e95c"
-  integrity sha512-2PL1UbvKeSjy/lUeJqHk+eR9CvuErXoCNwJI4jm3oNFEeY+9ELqHNKO1ZuSxAkasPkpWbmT/iMRMFxd3cEL3tQ==
+"graphql@^0.11.0 || ^0.12.0 || ^0.13.0 || ^14.0.0", graphql@^14.0.2, graphql@~14.3.0:
+  version "14.3.0"
+  resolved "https://registry.yarnpkg.com/graphql/-/graphql-14.3.0.tgz#34dd36faa489ff642bcd25df6c3b4f988a1a2f3e"
+  integrity sha512-MdfI4v7kSNC3NhB7cF8KNijDsifuWO2XOtzpyququqaclO8wVuChYv+KogexDwgP5sp7nFI9Z6N4QHgoLkfjrg==
   dependencies:
     iterall "^1.2.2"