HLA-1192: GitHub branch rename master to main

[s-goldman]

Resolves HLA-1192

Closes #

This PR addresses references to the master branch in the repository. The one reference has been changed to "main".

Checklist for maintainers

• added entry in CHANGELOG.rst within the relevant release section
• updated or added relevant tests
• updated relevant documentation
• added relevant milestone
• added relevant label(s)
• ran regression tests, post a link to the Jenkins job below.
  How to run regression tests on a PR

Jenkins test

[s-goldman]

@mdlpstsci This change only affects a line in the HapDiagnostic json file, specifically self.out_dict['general information']['commit id'] changed in the code diagnostic_utils.py here.

Other than this change, are there any other changes in HSTCal or other packages that may be affected by the change of the remote branch name from master to main?

I am following the instructions listed here

[codecov]

Codecov Report

Attention: 1 lines in your changes are missing coverage. Please review.

Comparison is base (fc546c6) 36.58% compared to head (ac136b2) 31.10%.

❗ Current head ac136b2 differs from pull request most recent head 6574e3d. Consider uploading reports for the commit 6574e3d to get more accurate results

Files	Patch %	Lines
drizzlepac/haputils/get_git_rev_info.py	0.00%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #1725      +/-   ##
==========================================
- Coverage   36.58%   31.10%   -5.49%     
==========================================
  Files         159      159              
  Lines       35120    35102      -18     
  Branches     5710        0    -5710     
==========================================
- Hits        12849    10918    -1931     
- Misses      21887    24184    +2297     
+ Partials      384        0     -384     

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[mdlpstsci]

@s-goldman
As far as I know the impact of the change will be for people who are working on this repo. They will need to refresh their clones.