fix(website): serialize methods with overload index

[brynpttrsn]

Please describe the changes this PR makes and why it should be merged:

Adds overloads prop to methods when serializing.

Fixes some overloads from appearing more than once in the outline.
https://discordjs.dev/docs/packages/voice/main/AudioPlayer:Class

Status and versioning classification:

• Code changes have been tested against the Discord API, or there are no code changes
• I know how to update typings and have done so, or typings don't need updating
• This PR only includes non-code changes, like changes to documentation, README, etc.

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Name	Status	Preview	Comments	Updated (UTC)
discord-js	✅ Ready (Inspect)	Visit Preview	💬 Add feedback	Nov 28, 2023 4:49am

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Name	Status	Preview	Comments	Updated (UTC)
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[codecov]

Codecov Report

Attention: 1 lines in your changes are missing coverage. Please review.

Comparison is base (bc2ecef) 58.79% compared to head (abc85e8) 58.79%.
Report is 1 commits behind head on main.

Files	Patch %	Lines
apps/website/src/components/documentation/util.ts	0.00%	1 Missing ⚠️

Additional details and impacted files

@@           Coverage Diff           @@
##             main   #10005   +/-   ##
=======================================
  Coverage   58.79%   58.79%           
=======================================
  Files         240      240           
  Lines       17033    17033           
  Branches     1240     1240           
=======================================
  Hits        10014    10014           
  Misses       6974     6974           
  Partials       45       45           

Flag	Coverage Δ
website	0.00% <0.00%> (ø)

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