Bump relay-runtime from 11.0.2 to 12.0.0 in /ui

Bumps [relay-runtime](https://github.com/facebook/relay) from 11.0.2 to 12.0.0.
- [Release notes](https://github.com/facebook/relay/releases)
- [Commits](facebook/relay@v11.0.2...v12.0.0)

---
updated-dependencies:
- dependency-name: relay-runtime
  dependency-type: direct:production
  update-type: version-update:semver-major
...

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

ui/package.json

@@ -88,7 +88,7 @@
     "redux": "^4.1.0",
     "redux-devtools-extension": "^2.13.9",
     "redux-thunk": "^2.3.0",
-    "relay-runtime": "^11.0.2",
+    "relay-runtime": "^12.0.0",
     "styled-jsx": "latest",
     "subscriptions-transport-ws": "^0.9.19",
     "uuid": "^8.3.2"