Allow pre-releases to be manually built for base executor image docker workflow

[AlejandroEsquivel]

• [ ] I have added the tests to cover my changes.
• [ ] I have updated the documentation and CHANGELOG accordingly.
• [ ] I have read the CONTRIBUTING document.

[codecov[bot]]

Codecov Report

Base: 97.98% // Head: 97.98% // No change to project coverage :thumbsup:

Coverage data is based on head (1de199d) compared to base (1bd6a7d). Patch has no changes to coverable lines.

Additional details and impacted files

```diff @@ Coverage Diff @@ ## develop #47 +/- ## ======================================== Coverage 97.98% 97.98% ======================================== Files 2 2 Lines 149 149 ======================================== Hits 146 146 Misses 3 3 ``` Help us with your feedback. Take ten seconds to tell us [how you rate us](https://about.codecov.io/nps?utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=AgnostiqHQ). Have a feature suggestion? [Share it here.](https://app.codecov.io/gh/feedback/?utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=AgnostiqHQ)

:umbrella: View full report at Codecov.
:loudspeaker: Do you have feedback about the report comment? Let us know in this issue.