Update HTTP API reference

[emmanuel-ferdman]

Problem

Commit cda41cc moved MarquezApp.java and lead to broken reference in README.md.

Solution

This PR adjusts sources to changes.

One-line summary:

Checklist

• You've signed-off your work
• Your changes are accompanied by tests (if relevant)
• Your change contains a small diff and is self-contained
• You've updated any relevant documentation (if relevant)
• You've included a one-line summary of your change for the CHANGELOG.md (Depending on the change, this may not be necessary).
• You've versioned your .sql database schema migration according to Flyway's naming convention (if relevant)
• You've included a header in any source code files (if relevant)

[boring-cyborg]

Thanks for opening your first pull request in the Marquez project! Please check out our contributing guidelines (https://github.com/MarquezProject/marquez/blob/main/CONTRIBUTING.md).

[netlify]

❌ Deploy Preview for peppy-sprite-186812 failed.

Name	Link
🔨 Latest commit	2681b31
🔍 Latest deploy log	https://app.netlify.com/sites/peppy-sprite-186812/deploys/680f0e5ceca38b0007f28e88

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 81.18%. Comparing base (a89b89c) to head (2681b31).

Additional details and impacted files

@@            Coverage Diff            @@
##               main    #3055   +/-   ##
=========================================
  Coverage     81.18%   81.18%           
  Complexity     1506     1506           
=========================================
  Files           268      268           
  Lines          7356     7356           
  Branches        325      325           
=========================================
  Hits           5972     5972           
  Misses         1226     1226           
  Partials        158      158           

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[emmanuel-ferdman]

Hi @wslulciuc, could you please review this small PR when you get the chance? thanks 🙌