Bump Microsoft.Extensions.Configuration from 7.0.0 to 8.0.0 in /src

Bumps [Microsoft.Extensions.Configuration](https://github.com/dotnet/runtime) from 7.0.0 to 8.0.0.
- [Release notes](https://github.com/dotnet/runtime/releases)
- [Commits](https://github.com/dotnet/runtime/commits)

---
updated-dependencies:
- dependency-name: Microsoft.Extensions.Configuration
  dependency-type: direct:production
  update-type: version-update:semver-major
...

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

src/Miha.Shared/Miha.Shared.csproj

@@ -12,7 +12,7 @@
       <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
     </PackageReference>
     <PackageReference Include="Microsoft.Extensions.Caching.Memory" Version="7.0.0" />
-    <PackageReference Include="Microsoft.Extensions.Configuration" Version="7.0.0" />
+    <PackageReference Include="Microsoft.Extensions.Configuration" Version="8.0.0" />
     <PackageReference Include="Microsoft.Extensions.DependencyInjection" Version="8.0.0" />
     <PackageReference Include="Microsoft.Extensions.Hosting" Version="7.0.1" />
     <PackageReference Include="Microsoft.Extensions.Options" Version="8.0.0" />