[deps] Tools: Update MailKit to v4.17.0

[renovate]

This PR contains the following updates:

Package	Change	Age	Confidence
MailKit (source)	[4.16.0] → [4.17.0]

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Release Notes

jstedfast/MailKit (MailKit)

v4.17.0

Compare Source

• Updated nullability of ImapClient.Inbox (which will never return null).
  (issue #​1996)
• Fixed IMAP's logic for ACL, LISTRIGHTS, MYRIGHTS, QUOTAROOT, QUOTA,
  and METADATA response parsers to properly handle []'s in the folder name.
  (issue #​2002)
• Updated System.Threading.Tasks.Extensions to v4.6.3.
• Updated System.Formats.Asn1 to v10.0.0 (instead of 10.0.2) for .NET 10.
• Bumped MimeKit dependency to 4.17.0.
• Code quality improvements.

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Configuration

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[bitwarden-bot]

Internal tracking:

• ID: PM-38706
• Link: https://bitwarden.atlassian.net/browse/PM-38706

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 65.47%. Comparing base (574f3fd) to head (d18b73f).
⚠️ Report is 43 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #7775   +/-   ##
=======================================
  Coverage   65.47%   65.47%           
=======================================
  Files        2173     2173           
  Lines       96580    96580           
  Branches     8691     8691           
=======================================
  Hits        63235    63235           
  Misses      31153    31153           
  Partials     2192     2192           

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