Bump AspNetCore.HealthChecks.Redis from 8.0.1 to 9.0.0

---
updated-dependencies:
- dependency-name: AspNetCore.HealthChecks.Redis
  dependency-version: 9.0.0
  dependency-type: direct:production
  update-type: version-update:semver-major
...

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

Author: dependabot[bot]

backend/Directory.Packages.props

@@ -111,7 +111,7 @@
 
   <ItemGroup Label="Health checks">
     <PackageVersion Include="AspNetCore.HealthChecks.SqlServer" Version="8.0.2" />
-    <PackageVersion Include="AspNetCore.HealthChecks.Redis" Version="8.0.1" />
+    <PackageVersion Include="AspNetCore.HealthChecks.Redis" Version="9.0.0" />
   </ItemGroup>
 
   <ItemGroup Label="MediatR pipeline behaviors">