GHA: Bump workflow versions to get rid of Nodejs v12 deprecation warnings

[OverOrion]

As seen here, the CI needs to be updated to use newer versions, because Nodejs v12 is deprecated and won't be available in the near future (no exact date yet).

See how it was done in integritee-network/integritee-node: integritee-network/integritee-node#168

See the official announcement: https://github.blog/changelog/2022-09-22-github-actions-all-actions-will-begin-running-on-node16-instead-of-node12/