fix(default_branch): use real-time remote

[linrongbin16]

Regression Test

Platforms

• windows
• macOS
• linux

Hosts

• Test on github.com.
• Test on gitlab.com.
• Test on bitbucket.org.
• Test on codeberg.org.
• Test on git.samba.org.

Functions

• Use GitLink to copy git link.
• Use GitLink! to open git link in browser.
• Use GitLink blame to copy the /blame git link.
• Use GitLink! blame to open the /blame git link in browser.
• Copy git link in a symlink directory of git repo.
• Copy git link in an un-pushed git branch, and receive an expected error.
• Copy git link in a pushed git branch but edited file, and receive a warning says the git link could be wrong.

[codecov]

Codecov Report

Attention: 2 lines in your changes are missing coverage. Please review.

Comparison is base (b20b740) 76.86% compared to head (969dc3a) 76.86%.

Files	Patch %	Lines
lua/gitlinker/git.lua	0.00%	1 Missing ⚠️
lua/gitlinker/linker.lua	0.00%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           master     #163      +/-   ##
==========================================
- Coverage   76.86%   76.86%   -0.01%     
==========================================
  Files          11       11              
  Lines        1003      990      -13     
==========================================
- Hits          771      761      -10     
+ Misses        232      229       -3     

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