Bump @guardian/discussion-rendering from 4.6.1 to 7.0.0

Bumps [@guardian/discussion-rendering](https://github.com/guardian/discussion-rendering) from 4.6.1 to 7.0.0.
- [Release notes](https://github.com/guardian/discussion-rendering/releases)
- [Commits](guardian/discussion-rendering@v4.6.1...v7.0.0)

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

Author: dependabot[bot]

package-lock.json

@@ -42,7 +42,7 @@
     "@guardian/bridget": "^1.8.0",
     "@guardian/content-api-models": "^15.10.0",
     "@guardian/content-atom-model": "^3.2.4",
-    "@guardian/discussion-rendering": "^4.6.1",
+    "@guardian/discussion-rendering": "^7.0.0",
     "@guardian/image-rendering": "github:guardian/image-rendering#1167f8bc",
     "@guardian/node-riffraff-artifact": "^0.1.9",
     "@guardian/renditions": "git+https://github.com/guardian/renditions.git#0.1.1",