rename RequestInfo to proper name ReleaseInfo

[haarg]

Somehow in the process of creating and refactoring the ReleaseInfo orchestrator, I gave it the wrong name.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 73.37%. Comparing base (29f566b) to head (8792653).
Report is 2 commits behind head on master.

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #3368      +/-   ##
==========================================
- Coverage   73.41%   73.37%   -0.05%     
==========================================
  Files          68       68              
  Lines        2389     2389              
  Branches      335      335              
==========================================
- Hits         1754     1753       -1     
- Misses        507      508       +1     
  Partials      128      128              

Files with missing lines	Coverage Δ
lib/MetaCPAN/Web/API/ReleaseInfo/Orchestrator.pm	100.00% <ø> (ø)
lib/MetaCPAN/Web/Model/ReleaseInfo.pm	82.05% <100.00%> (ø)

... and 1 file with indirect coverage changes

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