fix: upgrade @graphql-tools/stitch from 6.2.3 to 6.2.4 (#6956)

Snyk has created this PR to upgrade @graphql-tools/stitch from 6.2.3 to 6.2.4.

See this package in npm:
https://www.npmjs.com/package/@graphql-tools/stitch

See this project in Snyk:
https://app.snyk.io/org/dplewis/project/704d127e-7a24-4789-a0cd-807b7b972c86?utm_source=github&utm_medium=upgrade-pr

Author: snyk-bot

package-lock.json

@@ -21,7 +21,7 @@
   "dependencies": {
     "@apollographql/graphql-playground-html": "1.6.26",
     "@graphql-tools/links": "^6.2.4",
-    "@graphql-tools/stitch": "6.2.3",
+    "@graphql-tools/stitch": "6.2.4",
     "@graphql-tools/utils": "6.2.3",
     "@parse/fs-files-adapter": "1.0.1",
     "@parse/push-adapter": "3.3.0",