fix: webhook message editing on forums missing thread_id

[qoft]

Summary

Fix editing a webhook message if the thread is a forum post or if the thread is a private thread (no starter message)

Issue here

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.
• I have updated the changelog to include these changes.

[codecov]

Codecov Report

Merging #1981 (1bde4f9) into master (72f8966) will decrease coverage by 0.01%.
The diff coverage is 33.33%.

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #1981      +/-   ##
==========================================
- Coverage   33.31%   33.30%   -0.01%     
==========================================
  Files          97       97              
  Lines       18933    18935       +2     
==========================================
  Hits         6307     6307              
- Misses      12626    12628       +2     

Flag	Coverage Δ
macos-latest-3.10	33.29% <33.33%> (-0.01%)	⬇️
macos-latest-3.11	33.29% <33.33%> (-0.01%)	⬇️
macos-latest-3.8	33.30% <33.33%> (-0.01%)	⬇️
macos-latest-3.9	33.30% <33.33%> (-0.01%)	⬇️
ubuntu-latest-3.10	33.29% <33.33%> (-0.01%)	⬇️
ubuntu-latest-3.11	33.29% <33.33%> (-0.01%)	⬇️
ubuntu-latest-3.8	33.30% <33.33%> (-0.01%)	⬇️
ubuntu-latest-3.9	33.30% <33.33%> (-0.01%)	⬇️
windows-latest-3.10	33.29% <33.33%> (-0.01%)	⬇️
windows-latest-3.11	33.29% <33.33%> (-0.01%)	⬇️
windows-latest-3.8	33.30% <33.33%> (-0.01%)	⬇️
windows-latest-3.9	33.30% <33.33%> (-0.01%)	⬇️

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

Impacted Files	Coverage Δ
discord/webhook/async_.py	23.16% <33.33%> (-0.09%)	⬇️

---

Continue to review full report in Codecov by Sentry.

Legend - Click here to learn more
Δ = absolute <relative> (impact), ø = not affected, ? = missing data
Powered by Codecov. Last update 72f8966...1bde4f9. Read the comment docs.

[qoft]

Changes done

[qoft]

bump

[Lulalaby]

bump deez nuts

[qoft]

changes were done already ☝😲

[Lulalaby]

We check through prs if we have time.
No need to bump anything.

[plun1331]

Please add a changelog entry.

[Lulalaby]

@qoft please address the requested changes

x