fix: Enable the BROWSER environment variable

[kylecarbs]

This was breaking the automatic opening of links in GIT_ASKPASS on a git clone. I've tried to execute this script manually, and it does indeed work!

[github-actions]

✨ code-server dev build published to npm for PR #5695!

• Last publish status: success
• Commit: 6886265

To install in a local project, run:

npm install @coder/code-server-pr@5695

To install globally, run:

npm install -g @coder/code-server-pr@5695

[codecov]

Codecov Report

Merging #5695 (6886265) into main (efce005) will not change coverage.
The diff coverage is n/a.

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #5695   +/-   ##
=======================================
  Coverage   72.61%   72.61%           
=======================================
  Files          30       30           
  Lines        1680     1680           
  Branches      368      368           
=======================================
  Hits         1220     1220           
  Misses        397      397           
  Partials       63       63           

Impacted Files	Coverage Δ
src/node/routes/vscode.ts	83.33% <ø> (ø)

---

Continue to review full report at Codecov.

Legend - Click here to learn more
Δ = absolute <relative> (impact), ø = not affected, ? = missing data
Powered by Codecov. Last update efce005...6886265. Read the comment docs.