Enhance documentation for renderer addition process

[boxofyellow]

Added instructions for updating the changelog after adding a new renderer.

Description

Just updating the "new item doc" to streamline getting the change log updated.

Linked Items

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 95.64%. Comparing base (55c3cc5) to head (73fc991).
⚠️ Report is 1 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #134   +/-   ##
=======================================
  Coverage   95.64%   95.64%           
=======================================
  Files          28       28           
  Lines        1606     1606           
  Branches      171      171           
=======================================
  Hits         1536     1536           
  Misses         46       46           
  Partials       24       24           

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