Add `skip-news` to test only PRs

[StanFromIreland]

Closes https://github.com/python/bedevere/issues/669

[codecov[bot]]

Codecov Report

:white_check_mark: All modified and coverable lines are covered by tests. :white_check_mark: Project coverage is 100.00%. Comparing base (b45b0ee) to head (22a76bd). :warning: Report is 2 commits behind head on main.

@@            Coverage Diff            @@
##              main      #670   +/-   ##
=========================================
  Coverage   100.00%   100.00%           
=========================================
  Files           18        18           
  Lines         2149      2148    -1     
  Branches        97        97           
=========================================
- Hits          2149      2148    -1     

Flag	Coverage Δ
Python_3.10.18	100.00% <100.00%> (ø)
Python_3.11.13	100.00% <100.00%> (ø)
Python_3.12.11	100.00% <100.00%> (ø)
Python_3.13.5	?
Python_3.13.7	100.00% <100.00%> (?)
Python_3.14.0	100.00% <100.00%> (?)
Python_3.14.0-rc.1	?
Python_3.9.23	100.00% <100.00%> (ø)

Flags with carried forward coverage won't be shown. Click here to find out more.

Files with missing lines	Coverage Δ
bedevere/prtype.py	100.00% <100.00%> (ø)
tests/test_filepaths.py	100.00% <100.00%> (ø)
tests/test_prtype.py	100.00% <100.00%> (ø)

:rocket: New features to boost your workflow:

• :snowflake: Test Analytics: Detect flaky tests, report on failures, and find test suite problems.