Plot voltage components bugfix

[Daniel-Nicolae23]

Description

• Fixes a small bug where the electrode_phases parameter was not passed correctly to pybamm.plot_voltage_components()
• Updates function docstrings

Fixes # (issue)

Type of change

Please add a line in the relevant section of CHANGELOG.md to document the change (include PR #)

Important checks:

Please confirm the following before marking the PR as ready for review:

• No style issues: nox -s pre-commit
• All tests pass: nox -s tests
• The documentation builds: nox -s doctests
• Code is commented for hard-to-understand areas
• Tests added that prove fix is effective or that feature works

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 98.76%. Comparing base (24db71a) to head (7c8205d).

Additional details and impacted files

@@             Coverage Diff             @@
##           develop    #5270      +/-   ##
===========================================
- Coverage    98.78%   98.76%   -0.02%     
===========================================
  Files          321      321              
  Lines        27642    27693      +51     
===========================================
+ Hits         27305    27352      +47     
- Misses         337      341       +4     

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