Bump MimeKit

Bumps MimeKit from 3.4.3 to 4.7.1.

---
updated-dependencies:
- dependency-name: MimeKit
  dependency-type: direct:production
...

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

SocialEventManager/src/SocialEventManager.Infrastructure/SocialEventManager.Infrastructure.csproj

@@ -25,7 +25,7 @@
 		</PackageReference>
 		<PackageReference Include="Microsoft.Extensions.Diagnostics.HealthChecks.Abstractions" Version="7.0.1" />
 		<PackageReference Include="Microsoft.Extensions.Hosting.Abstractions" Version="7.0.0" />
-		<PackageReference Include="MimeKit" Version="3.4.3" />
+		<PackageReference Include="MimeKit" Version="4.7.1" />
 		<PackageReference Include="NetEscapades.EnumGenerators" Version="1.0.0-beta04" />
 		<PackageReference Include="ReflectionAnalyzers" Version="0.3.1">
 			<PrivateAssets>all</PrivateAssets>