Update Serilog.AspNetCore requirement from 6.* to 7.*

Updates the requirements on [Serilog.AspNetCore](https://github.com/serilog/serilog-aspnetcore) to permit the latest version.
- [Release notes](https://github.com/serilog/serilog-aspnetcore/releases)
- [Commits](serilog/serilog-aspnetcore@v6.0.0...v7.0.0)

---
updated-dependencies:
- dependency-name: Serilog.AspNetCore
  dependency-type: direct:production
...

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

RedLeg.Forms.csproj

@@ -1,4 +1,4 @@
-<Project Sdk="Microsoft.NET.Sdk.Web">
+<Project Sdk="Microsoft.NET.Sdk.Web">
 
   <PropertyGroup>
     <TargetFramework>net7.0</TargetFramework>
@@ -29,7 +29,7 @@
     <PackageReference Include="Swashbuckle.Core" Version="5.*" />
 
     <PackageReference Include="Sentry.AspNetCore" Version="3.*" />
-    <PackageReference Include="Serilog.AspNetCore" Version="6.*" />
+    <PackageReference Include="Serilog.AspNetCore" Version="7.*" />
     <PackageReference Include="Microsoft.ApplicationInsights.AspNetCore" Version="2.*" />
     <PackageReference Include="Microsoft.Extensions.Logging.ApplicationInsights" Version="2.*" />
   </ItemGroup>