fix: replace :: with localhost before openBrowser()

[chousheng]

• This is a bugfix
• This is a feature
• This is a code refactor
• This is a test update
• This is a docs update
• This is a metadata update

For Bugs and Features; did you add new tests?

test/server/open-option.test.js is modified.

Motivation / Use-Case

This PR resolves #4855. See #4855 for more details.

Breaking Changes

N/A

Additional Info

Below are the screencasts showing the fix on Windows and GitHub Codespaces.

Windows:

Before fix	After fix
windows-before-fix.mov	windows-after-fix.mov

GitHub Codespaces:

Before fix	After fix
codespaces-before-fix.mov	codespaces-after-fix.mov

[linux-foundation-easycla]

The committers listed above are authorized under a signed CLA.

• ✅ login: chousheng / name: Sheng Chou (ac971bd)

[codecov]

Codecov Report

Patch coverage: 100.00% and project coverage change: +0.12 🎉

Comparison is base (4e35921) 91.72% compared to head (436bbd4) 91.85%.

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #4856      +/-   ##
==========================================
+ Coverage   91.72%   91.85%   +0.12%     
==========================================
  Files          16       16              
  Lines        1704     1706       +2     
  Branches      647      649       +2     
==========================================
+ Hits         1563     1567       +4     
+ Misses        130      128       -2     
  Partials       11       11              

Impacted Files	Coverage Δ
lib/Server.js	93.81% <100.00%> (+0.16%)	⬆️

☔ View full report in Codecov by Sentry.
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[chousheng]

@alexander-akait, @snitin315. Thank you for reviewing!

Please let me know if I need to rebase the commit or do anything else before getting the PR merged.

[snitin315]

We will merge this once CI is green.