Bump NLog from 4.6.8 to 4.7.0 (#76)

Bumps [NLog](https://github.com/NLog/NLog) from 4.6.8 to 4.7.0.
- [Release notes](https://github.com/NLog/NLog/releases)
- [Changelog](https://github.com/NLog/NLog/blob/dev/CHANGELOG.md)
- [Commits](NLog/NLog@v4.6.8...v4.7)

Signed-off-by: dependabot-preview[bot] <[email protected]>

Co-authored-by: dependabot-preview[bot] <27856297+dependabot-preview[bot]@users.noreply.github.com>

Author: dependabot-preview[bot]

src/NLog.MailKit/NLog.MailKit.csproj

@@ -61,6 +61,6 @@ this package will overwrite the original Mail Target.
     <PackageReference Include="MailKit" Version="2.6.0" />
   </ItemGroup>
   <ItemGroup>
-    <PackageReference Include="NLog" Version="4.6.8" />
+    <PackageReference Include="NLog" Version="4.7.0" />
   </ItemGroup>
 </Project>