Bump Scalar.AspNetCore from 2.6.9 to 2.9.0

---
updated-dependencies:
- dependency-name: Scalar.AspNetCore
  dependency-version: 2.9.0
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

Author: dependabot[bot]

samples/Sample.MinimalApi/Sample.MinimalApi.csproj

@@ -8,7 +8,7 @@
 
   <ItemGroup>
     <PackageReference Include="Microsoft.AspNetCore.OpenApi" Version="9.0.10" />
-    <PackageReference Include="Scalar.AspNetCore" Version="2.6.9" />
+    <PackageReference Include="Scalar.AspNetCore" Version="2.9.0" />
   </ItemGroup>
 
   <ItemGroup>