Fix cache dir creation race confition

[mfisherlevine]

Fix race condition

[codecov]

Codecov Report

Merging #2274 (215f99c) into main (cda88ef) will decrease coverage by 0.00%.
The diff coverage is 100.00%.

@@            Coverage Diff             @@
##             main    #2274      +/-   ##
==========================================
- Coverage   62.72%   62.72%   -0.01%     
==========================================
  Files         131      131              
  Lines       16855    16854       -1     
==========================================
- Hits        10573    10572       -1     
  Misses       6282     6282              

Impacted Files	Coverage Δ
astroquery/query.py	58.69% <100.00%> (-0.18%)	⬇️

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[bsipocz]

I'm not yet sure whether we need a changelog for this, so leaving it as is and I'll come back to it at release time when finalizing the release changelog.

[bsipocz]

Thanks @mfisherlevine!

[mfisherlevine]

You're very welcome, thank you for making the process so easy, and sorry for not managing to follow the procedures a little better, was in a huge hurry last night and was trying to get that in before running out the door!