Release notes script follow-ups

[Stanzilla]

test-release-notification-output
Node.js 16 actions are deprecated. Please update the following actions to use Node.js 20: pCYSl5EDgo/cat@master. For more information see: https://github.blog/changelog/2023-09-22-github-actions-transitioning-from-node-16-to-node-20/.
test-release-notification-output
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/
test-release-notification-output
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/
test-discord-release-notification
Node.js 16 actions are deprecated. Please update the following actions to use Node.js 20: tsickert/discord-webhook@v5.4.0. For more information see: https://github.blog/changelog/2023-09-22-github-actions-transitioning-from-node-16-to-node-20/.
test-twitter-release-notification
nearform-actions/github-action-notify-twitter is pinned at HEAD. We strongly advise against pinning to "@master" as it may be unstable. Please update your GitHub Action YAML from: uses: 'nearform-actions/github-action-notify-twitter@master' to: uses: 'nearform-actions/github-action-notify-twitter@<release/tag version>' Alternatively, you can pin to any git tag or git SHA in the repository.