Update other build configuration

The master branch of this repository has been migrated to main using the [master-to-main](https://github.com/guardian/master-to-main) tool.

Please check any build related configuration and update as required:

- [ ] TeamCity - See the required steps in the [migrating.md](https://github.com/guardian/master-to-main/blob/main/migrating.md#update-ci-typically-teamcity) document
- [ ] Change snyk github integration(s) - it uses the default branch, but you will need to delete and reimport the project+file as this is the only way to refresh the default branch at present.
- [ ] Any other externally configured analysis tooling your team is using e.g. travis CI

It's probably a good idea to merge test PR to main once this is complete, to make sure that everything is working as expected. :slightly_smiling_face: