fix(docs): Use updated names for ProxyEventType

[michaelbrewer]

Issue #, if available:

Description of changes:

Use the updated names for ProxyEventType which are now CamelCased.

Checklist

• Meet tenets criteria
• Update tests
• Update docs
• PR title follows conventional commit semantics

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[michaelbrewer]

@heitorlessa maybe we can hotfix the docs under v1.15.0? as we are not modifying the actually shipped code.

[codecov-commenter]

Codecov Report

Merging #424 (641ec73) into develop (bd1dbf0) will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff            @@
##           develop     #424   +/-   ##
========================================
  Coverage    99.89%   99.89%           
========================================
  Files          101      101           
  Lines         3994     3994           
  Branches       198      198           
========================================
  Hits          3990     3990           
  Misses           1        1           
  Partials         3        3           

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[heitorlessa]

Ugh, missed that. Sure, I'll update it tomorrow morning.

I'll keep it open in case someone comes looking until tomorrow

Update: Scratch that, this will be best merged and available under develop version for now.

Thank you!