Merge pull request #1958 from Skyscanner/donburi/DON-491-update-searc… · Skyscanner/backpack-ios@d53ff06

The `set-output` command is deprecated and will be disabled soon. Please upgrade to using Environment Files. For more information see: https://github.blog/changelog/2022-10-11-github-actions-deprecating-save-state-and-set-output-commands/