renaming file containing spotify OSS maintainer metadata

[csharma214]

This PR is renaming the file catalog.yaml that was added in this PR to catalog-info.yaml, which is the correct name used internally

[codecov]

Codecov Report

Merging #585 (b6906ec) into master (ba739b1) will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##           master     #585   +/-   ##
=======================================
  Coverage   70.70%   70.70%           
=======================================
  Files          40       40           
  Lines        1707     1707           
  Branches      148      148           
=======================================
  Hits         1207     1207           
  Misses        500      500           

Flag	Coverage Δ
ratatoolCli	3.07% <ø> (ø)
ratatoolCommon	∅ <ø> (∅)
ratatoolDiffy	29.91% <ø> (ø)
ratatoolExamples	15.97% <ø> (ø)
ratatoolSampling	62.57% <ø> (ø)
ratatoolScalacheck	81.53% <ø> (ø)
ratatoolShapeless	4.41% <ø> (ø)

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