Bump MailKit in /match/src/Piipan.Match/Piipan.Match.Core

Bumps [MailKit](https://github.com/jstedfast/MailKit) from 3.5.0 to 4.6.0.
- [Changelog](https://github.com/jstedfast/MailKit/blob/master/ReleaseNotes.md)
- [Commits](jstedfast/MailKit@3.5.0...4.6.0)

---
updated-dependencies:
- dependency-name: MailKit
  dependency-type: direct:production
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <support@github.com>

notifications/src/Piipan.Notifications.Core/Piipan.Notifications.Core.csproj

@@ -15,7 +15,7 @@
   <ItemGroup>
     <PackageReference Include="Antlr4.Runtime" Version="4.6.6" />
     <PackageReference Include="Azure.Messaging.EventGrid" Version="4.13.0" />
-    <PackageReference Include="MailKit" Version="3.5.0" />
+    <PackageReference Include="MailKit" Version="4.6.0" />
     <PackageReference Include="Microsoft.Extensions.Logging" Version="6.0.0" />
     <PackageReference Include="Newtonsoft.Json" Version="13.0.2" />
     <PackageReference Include="StringTemplate4" Version="4.0.8" />