feat: Fix release script for renamed master to main

[astuyve]

What does this PR do?

Our release script won't work right now because we renamed the master branch to main, but the script still expects master to be the primary branch.

Motivation

I'd like to release this library.

Testing Guidelines

Additional Notes

Types of changes

• [ ] Bug fix
• [ ] New feature
• [ ] Breaking change
• [ ] Misc (docs, refactoring, dependency upgrade, etc.)

Check all that apply

• [ ] This PR's description is comprehensive
• [ ] This PR contains breaking changes that are documented in the description
• [ ] This PR introduces new APIs or parameters that are documented and unlikely to change in the foreseeable future
• [ ] This PR impacts documentation, and it has been updated (or a ticket has been logged)
• [ ] This PR's changes are covered by the automated tests
• [ ] This PR collects user input/sensitive content into Datadog

[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

:exclamation: No coverage uploaded for pull request base (main@8777e57). Click here to learn what that means.

:exclamation: Current head 94e1b53 differs from pull request most recent head c059792. Consider uploading reports for the commit c059792 to get more accurate results

Additional details and impacted files

```diff @@ Coverage Diff @@ ## main #113 +/- ## ======================================= Coverage ? 86.43% ======================================= Files ? 8 Lines ? 612 Branches ? 153 ======================================= Hits ? 529 Misses ? 72 Partials ? 11 ```

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