Update release workflow to remove deprecated commands

[benfrancis]

The Upload Release Asset and Upload Release Asset Checksum jobs in the release workflow are using actions/upload-release-asset@v1.0.1 which appears to use the deprecated set-output command.

Warning: 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/