Unlisted changes for ss3diags 2.0.3

[efletcherPIFSC]

Unlisted changes for package changelog (NEWS.md) for ss3diags 2.0.3

• Fixed Ensemble Quantile Shading Issues (https://github.com/PIFSCstockassessments/ss3diags/issues/4)
• Replaced the example datasets in the ss3diags cookbook, and the handbook with the current "simple" ensemble model.
• Fixup minor code documentation formatting issues.
• Implemented NOAA-fish-tools/ghactions4r integrated code styler and documentation for pull requests
  • SSmase and SSplotHcxval: Fixed up code styler's dollar subset conversion issues. example:message(x$name is 1,2,3,4)