fix failing container setup

[damonmcc]

dcpy tests are failing to run on all PRs (example)

during the Run Container Setup step:

fatal: detected dubious ownership in repository at '/home/vscode/workspace'

seems to be because:

1. we use the devcontainer in CI which sets "workspaceFolder": "/home/vscode/workspace"
2. subtle things in the background of github actions seem to be changing (see recent PR Trying a GHA Fix #2287)

I tried variations of this fix that seemed cleaner than adding two safe directories, but they didn't work and this doesn't seem so bad. would rather not mess with the devcontainer's configuration

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 73.72%. Comparing base (07569a1) to head (30d9571).
⚠️ Report is 2 commits behind head on main.

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[alexrichey]

thanks! 🙏