Bump Serilog.AspNetCore from 7.0.0 to 8.0.3

Bumps [Serilog.AspNetCore](https://github.com/serilog/serilog-aspnetcore) from 7.0.0 to 8.0.3.
- [Release notes](https://github.com/serilog/serilog-aspnetcore/releases)
- [Commits](https://github.com/serilog/serilog-aspnetcore/commits)

---
updated-dependencies:
- dependency-name: Serilog.AspNetCore
  dependency-type: direct:production
  update-type: version-update:semver-major
...

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

Author: dependabot[bot]

DigitalLearningSolutions.Data/DigitalLearningSolutions.Data.csproj

@@ -17,7 +17,7 @@
     <PackageReference Include="FuzzySharp" Version="2.0.2" />
     <PackageReference Include="MailKit" Version="4.3.0" />
     <PackageReference Include="Microsoft.FeatureManagement.AspNetCore" Version="2.0.0" />
-    <PackageReference Include="Serilog.AspNetCore" Version="7.0.0" />
+    <PackageReference Include="Serilog.AspNetCore" Version="8.0.3" />
     <PackageReference Include="System.Drawing.Common" Version="8.0.0" />
   </ItemGroup>