How to provide manual input?

Hello,

we are using git-flow to manage versions, releases and further development.
Now for example when we release a new version the release management requires that we specify the next version during the manual release step.
How can we provide input to this manually triggered step?
In jenkins e.g. you would configure a pipeline-input-step for this reason (Pipeline: Input Step) how can we achieve this with gitlab-ci?

Thanke you!
Malte