chore: update codecov to 3.7.1

[jsjoeio]

Fixes N/A

[github-actions]

✨ code-server docs for PR #5296 is ready! It will be updated on every commit.

• Host: https://coder.com/docs/code-server/f011a7f
• Last deploy status: success
• Commit: 89e73e6
• Workflow status: https://github.com/coder/code-server/actions/runs/2557017874

[github-actions]

✨ code-server dev build published to npm for PR #5296!

• Last publish status: success
• Commit: 89e73e6

To install in a local project, run:

npm install @coder/code-server-pr@5296

To install globally, run:

npm install -g @coder/code-server-pr@5296

[jsjoeio]

Argh... so a couple things:

• this vulneraility report shows a patched version which does not exist: GHSA-mh2h-6j8q-x246
• codecov deprecated their node uploader which means the true solution is to migrate away from it and use the new uploader

I will open a separate PR and then close this one.

[jsjoeio]

Closing instead in favor of #5303