Bump the dotnet group with 1 update (#4694)

Bumps Scalar.AspNetCore from 2.8.0 to 2.8.4

---
updated-dependencies:
- dependency-name: Scalar.AspNetCore
  dependency-version: 2.8.4
  dependency-type: direct:production
  update-type: version-update:semver-patch
  dependency-group: dotnet
...

Signed-off-by: dependabot[bot] <[email protected]>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: dependabot[bot]

docs/fundamentals/snippets/custom-urls/AspireApp.Api/AspireApp.Api.csproj

@@ -8,7 +8,7 @@
 
   <ItemGroup>
     <PackageReference Include="Microsoft.AspNetCore.OpenApi" Version="9.0.9" />
-    <PackageReference Include="Scalar.AspNetCore" Version="2.8.0" />
+    <PackageReference Include="Scalar.AspNetCore" Version="2.8.4" />
   </ItemGroup>
 
 </Project>