When producing canary release the version is calculated incorrectly

[kichristensen]

Describe the bug

When publishing the canary release the magefile tries to determine the version of the commit. That is not possible as Github Actions by default checks out the repository with a depth of 1, making it impossible to determine the correct version using git describe --tags.
See https://github.com/getporter/porter/actions/runs/8861567104/job/24333736800 for an example of a failing action

To Reproduce

Steps to reproduce the behavior:

1. Merge to main
2. See that the porter-canary action fails

Expected behavior

The action should succeed