Bump MailKit from 4.9.0 to 4.16.0 (AscensionGameDev#2815)

---
updated-dependencies:
- dependency-name: MailKit
  dependency-version: 4.16.0
  dependency-type: direct:production
...

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Intersect.Server/Intersect.Server.csproj

@@ -111,7 +111,7 @@
     <PackageReference Include="Asp.Versioning.OData.ApiExplorer" Version="8.1.0" />
     <PackageReference Include="Htmx" Version="1.8.1" />
     <PackageReference Include="Htmx.TagHelpers" Version="1.8.1" />
-    <PackageReference Include="MailKit" Version="4.9.0" />
+    <PackageReference Include="MailKit" Version="4.16.0" />
     <PackageReference Include="Markdown" Version="2.2.1" />
     <PackageReference Include="Microsoft.AspNetCore.Authentication.JwtBearer" Version="8.0.11" />
     <PackageReference Include="Microsoft.AspNetCore.Authentication.OpenIdConnect" Version="8.0.11" />