feat: add GIF sticker format

[Dorukyum]

This pull requests fixes a bug which breaks pycord bots due to a new sticker format.

Information

• This PR fixes an issue.
• This PR adds something new (e.g. new method or parameters).
• This PR is a breaking change (e.g. methods or parameters removed/renamed).
• This PR is not a code change (e.g. documentation, README, typehinting,
  examples, ...).

Checklist

• I have searched the open pull requests for duplicates.
• If code changes were made then they have been tested.
  • I have updated the documentation to reflect the changes.
• If type: ignore comments were used, a comment is also left explaining why.

[codecov]

Codecov Report

Merging #1915 (44c310c) into master (af12f33) will increase coverage by 0.00%.
The diff coverage is 50.00%.

❗ Current head 44c310c differs from pull request most recent head 8794c08. Consider uploading reports for the commit 8794c08 to get more accurate results

Additional details and impacted files

@@           Coverage Diff           @@
##           master    #1915   +/-   ##
=======================================
  Coverage   33.33%   33.34%           
=======================================
  Files          97       97           
  Lines       18753    18754    +1     
=======================================
+ Hits         6252     6253    +1     
  Misses      12501    12501           

Flag	Coverage Δ
macos-latest-3.10	33.32% <50.00%> (+<0.01%)	⬆️
macos-latest-3.11	33.32% <50.00%> (+<0.01%)	⬆️
macos-latest-3.8	33.33% <50.00%> (+<0.01%)	⬆️
macos-latest-3.9	33.33% <50.00%> (+<0.01%)	⬆️
ubuntu-latest-3.10	33.32% <50.00%> (+<0.01%)	⬆️
ubuntu-latest-3.11	33.32% <50.00%> (+<0.01%)	⬆️
ubuntu-latest-3.8	33.33% <50.00%> (+<0.01%)	⬆️
ubuntu-latest-3.9	33.33% <50.00%> (+<0.01%)	⬆️
windows-latest-3.10	33.32% <50.00%> (+<0.01%)	⬆️
windows-latest-3.11	33.32% <50.00%> (+<0.01%)	⬆️
windows-latest-3.8	33.33% <50.00%> (+<0.01%)	⬆️
windows-latest-3.9	33.33% <50.00%> (+<0.01%)	⬆️

Flags with carried forward coverage won't be shown. Click here to find out more.

Impacted Files	Coverage Δ
discord/enums.py	79.96% <50.00%> (+0.03%)	⬆️

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[BobDotCom]

• Changelog entry needed
• See my suggestion for avoidance of future KeyErrors if this happens again.

fixed