Fix get recordings spec

[Karolk99]

Acknowledging the stipulations set forth:

• I hereby confirm that a Pull Request involving updates to the Software Development Kit (SDK) has been smoothly merged, currently awaits processing, or is otherwise deemed unnecessary in this context.
• I also affirm that another Pull Request, specifically addressing updates to the documentation body (commonly referred to as 'docs'), has either been successfully incorporated, is in the process of review, or is considered superfluous under the prevailing circumstances.

[codecov]

Codecov Report

Merging #124 (4ca1e60) into main (6538d54) will not change coverage.
The diff coverage is 100.00%.

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #124   +/-   ##
=======================================
  Coverage   86.18%   86.18%           
=======================================
  Files          54       54           
  Lines         992      992           
=======================================
  Hits          855      855           
  Misses        137      137           

Files	Coverage Δ
lib/jellyfish_web/controllers/recording_json.ex	100.00% <100.00%> (ø)

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[Rados13]

It isn't the scope of this PR, but we should think about a way to check the returned JSON structure with generated OpenApiSpec automatically.

[Karolk99]

It isn't the scope of this PR, but we should think about a way to check the returned JSON structure with generated OpenApiSpec automatically.

https://membraneframework.atlassian.net/jira/software/c/projects/RTC/boards/18/backlog?selectedIssue=RTC-419