BUG: fix skyview radius

[bsipocz]

Easy fix, but no one picked it up in the past year. The PR also works towards #1746
This should close #2190

[codecov]

Codecov Report

Merging #2601 (ed9cdb7) into main (0eb8daa) will increase coverage by 0.12%.
The diff coverage is 50.00%.

@@            Coverage Diff             @@
##             main    #2601      +/-   ##
==========================================
+ Coverage   64.08%   64.21%   +0.12%     
==========================================
  Files         131      130       -1     
  Lines       16927    16885      -42     
==========================================
- Hits        10847    10842       -5     
+ Misses       6080     6043      -37     

Impacted Files	Coverage Δ
astroquery/skyview/core.py	90.29% <50.00%> (ø)
astroquery/esa/hubble/core.py	83.63% <0.00%> (-2.84%)	⬇️
astroquery/utils/commons.py	75.14% <0.00%> (-1.58%)	⬇️
...roquery/ipac/nexsci/nasa_exoplanet_archive/core.py	57.08% <0.00%> (-0.47%)	⬇️
astroquery/esa/jwst/core.py	75.43% <0.00%> (ø)
astroquery/utils/download_file_list.py
astroquery/utils/tap/core.py	44.55% <0.00%> (+0.23%)	⬆️
astroquery/jplhorizons/core.py	65.62% <0.00%> (+0.32%)	⬆️
astroquery/mast/auth.py	60.86% <0.00%> (+0.45%)	⬆️
astroquery/utils/cleanup_downloads.py	93.33% <0.00%> (+26.66%)	⬆️

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