Bump the nuget group with 1 update (#8)

Bumps System.Drawing.Common from 4.7.0 to 4.7.2

---
updated-dependencies:
- dependency-name: System.Drawing.Common
  dependency-version: 4.7.2
  dependency-type: direct:production
  dependency-group: nuget
...

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Co-authored-by: andreaslampe <68891717+andreaslampe@users.noreply.github.com>

Author: dependabot[bot]

MailAgent/MailAgent.csproj

@@ -94,6 +94,7 @@
   </ItemGroup>
 
   <ItemGroup>
+    <PackageReference Include="System.Drawing.Common" Version="4.7.2" />
     <PackageReference Include="System.Security.Cryptography.Xml" Version="4.7.1" />
     <EmbeddedResource Remove="obj\**" />
   </ItemGroup>