fix: correct the rc calculation

[github-actions]

This is the main issue tracking #121

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Description copied from PR:

Related Issue

Addresses #5

Description

The rc version is getting a repeating "-rc-rc-rc" with every release. It is also calculating the rc based on the last release rather than the next one. This is due to the way we isolate the patch version in the script. Now we increment the minor if there isn't already an rc in place. In practice we should probably just manually tag the first rc of the expected next version just to get the ball rolling.

Testing

actionlint

Not a breaking change.

[matttrach]

released