Bump MimeKitLite from 4.5.0 to 4.7.1

Bumps MimeKitLite from 4.5.0 to 4.7.1.

---
updated-dependencies:
- dependency-name: MimeKitLite
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

TACTLib/TACTLib.csproj

@@ -10,7 +10,7 @@
   <ItemGroup>
     <PackageReference Include="CommunityToolkit.HighPerformance" Version="8.2.2" />
     <PackageReference Include="Google.Protobuf" Version="3.25.0" />
-    <PackageReference Include="MimeKitLite" Version="4.5.0" />
+    <PackageReference Include="MimeKitLite" Version="4.7.1" />
   </ItemGroup>
   <Target Name="SetSourceRevisionIdGit" BeforeTargets="BeforeBuild">
     <Exec Command="git describe --long --always --dirty --exclude=* --abbrev=8" ConsoleToMSBuild="True" IgnoreExitCode="False" ContinueOnError="True">