Bump graphql-sse from 2.1.4 to 2.5.2 in /integration

Bumps [graphql-sse](https://github.com/enisdenjo/graphql-sse) from 2.1.4 to 2.5.2.
- [Release notes](https://github.com/enisdenjo/graphql-sse/releases)
- [Changelog](https://github.com/enisdenjo/graphql-sse/blob/master/CHANGELOG.md)
- [Commits](enisdenjo/graphql-sse@v2.1.4...v2.5.2)

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

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

integration/package.json

@@ -15,7 +15,7 @@
         "@graphql-codegen/schema-ast": "^4.0.0",
         "graphql": "^16.6.0",
         "graphql-codegen": "^0.4.0",
-        "graphql-sse": "^2.1.4",
+        "graphql-sse": "^2.5.2",
         "graphql-ws": "^5.13.1",
         "typescript": "^5.0.2",
         "urql": "^4.0.3",