Mark a test with missing skipif_no_network marker

[jwodder]

No description provided.

[codecov]

Codecov Report

Merging #886 (e5a6dd4) into master (1585b4d) will increase coverage by 0.02%.
The diff coverage is 100.00%.

@@            Coverage Diff             @@
##           master     #886      +/-   ##
==========================================
+ Coverage   86.66%   86.69%   +0.02%     
==========================================
  Files          61       61              
  Lines        7194     7195       +1     
==========================================
+ Hits         6235     6238       +3     
+ Misses        959      957       -2     

Flag	Coverage Δ
unittests	86.69% <100.00%> (+0.02%)	⬆️

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Impacted Files	Coverage Δ
dandi/tests/test_metadata.py	100.00% <100.00%> (ø)
dandi/support/tests/test_iterators.py	100.00% <0.00%> (+5.26%)	⬆️

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[yarikoptic]

Thank you!