stateCd "whatNWISsites" function fix#729

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ldecicco-USGS merged 3 commits intoDOI-USGS:mainfrom

ldecicco-USGS:more_st_cds

Oct 2, 2024

Commits on Sep 5, 2024

when we changed the code for the gwlevel state data, I didn't test how it would affect the whatNWISsites function.
ldecicco-USGS
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Commits on Sep 20, 2024

Merge branch 'main' of https://github.com/DOI-USGS/dataRetrieval into more_st_cds
ldecicco-USGS
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Commits on Oct 2, 2024

cleaned up some examples
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