ci: publish action should run on the main branch

[amondnet]

Describe the changes proposed in this Pull Request.

@pavanpodila

After renaming the master branch to main, publish is not running.

mobx.dart/.github/workflows/publish.yml

Line 6 in d14a27e

- master

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Pull Request Checklist

• If the changes are being made to code, ensure the version in pubspec.yaml is updated.
• Increment the major/minor/patch/patch-count, depending on the complexity of change
• Add the necessary unit tests to ensure the coverage does not drop
• Update the Changelog to include all changes made in this PR, organized by version
• Run the melos run set_version command from the root directory
• Include the necessary reviewers for the PR
• Update the docs if there are any API changes or additions to functionality

[netlify]

👷 Deploy request for mobx pending review.

Visit the deploys page to approve it

Name	Link
🔨 Latest commit	1966d75

[codecov]

Codecov Report

Merging #965 (1966d75) into main (d14a27e) will not change coverage.
The diff coverage is n/a.

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #965   +/-   ##
=======================================
  Coverage   99.00%   99.00%           
=======================================
  Files          57       57           
  Lines        2005     2005           
=======================================
  Hits         1985     1985           
  Misses         20       20           

Flag	Coverage Δ
flutter_mobx	100.00% <ø> (ø)
mobx	98.56% <ø> (ø)
mobx_codegen	100.00% <ø> (ø)

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[amondnet]

I temporarily recreated the master branch. Since the pr has been merged, I will delete the master branch.