[RF-31415] Fix setting of version when starting a run

[magni-]

This is used by the CLI to mark the run as being initiated by the GH Action: https://github.com/rainforestapp/rainforest-cli/blob/v3.5.0/rainforest-cli.go#L106-L110, and broken in 422af7e.

I temporarily enabled the rainforest workflow on this branch to test the fix:

Prior to the fix: https://github.com/rainforestapp/github-action/actions/runs/6884662525/job/18727576457#step:5:25

❌ compared rainforest-cli to rainforest-gh-action

After the fix: https://github.com/rainforestapp/github-action/actions/runs/6884752372/job/18727819110#step:5:25

✅ compared rainforest-gh-action to rainforest-gh-action

[marvin-rfbot]

https://rainforest.atlassian.net/browse/RF-31415

[magni-]

/reviewme @rainforestapp/devs