Fix ArgumentError Malformed version number string in github actions

[amazimbe]

What are you trying to accomplish?

Fix issue: https://github.com/github/dependabot-updates/issues/6446

More than 7.6k occurrences of this issue in Sentry and a large proportion of these are in the github actions ecosystem.

https://github.com/github/dependabot-updates/issues/6446

How will you know you've accomplished your goal?

I expect no more occurrences of this issue, with an empty string version, in github actions

Checklist

• I have run the complete test suite to ensure all tests and linters pass.
• I have thoroughly tested my code changes to ensure they work as expected, including adding additional tests for new functionality.
• I have written clear and descriptive commit messages.
• I have provided a detailed description of the changes in the pull request, including the problem it addresses, how it fixes the problem, and any relevant details about the implementation.
• I have ensured that the code is well-documented and easy to understand.

[thavaahariharangit]

LGTM

[jurre]

Could you explain what the scenario is that causes this error to happen and what the result for the end user is right now, and what it will be after this change?