feat: update pypa's publish branch away from master

[brobro10000]

Update publish workflow to point away from master and to the documentation's stated branch

https://github.com/pypa/gh-action-pypi-publish

Other related PRs:
openedx/edx-enterprise#1835
openedx/edx-enterprise-data#386
openedx/enterprise-subsidy#143
openedx/edx-rest-api-client#288
openedx/openedx-ledger#32
openedx-unsupported/ecommerce-worker#205
openedx/edx-rbac#247
edx/braze-client#16

[codecov]

Codecov Report

Patch and project coverage have no change.

Comparison is base (02ec6d0) 100.00% compared to head (5e027c2) 100.00%.

Additional details and impacted files

@@            Coverage Diff            @@
##            master      #135   +/-   ##
=========================================
  Coverage   100.00%   100.00%           
=========================================
  Files           27        27           
  Lines          684       684           
  Branches        42        42           
=========================================
  Hits           684       684           

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