deps: Bump KubernetesClient from 19.0.2 to 21.0.8

---
updated-dependencies:
- dependency-name: KubernetesClient
  dependency-version: 21.0.8
  dependency-type: direct:production
  update-type: version-update:semver-major
...

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

Author: dependabot[bot]

src/SharpCoreDB.AppHost/SharpCoreDB.AppHost.csproj

@@ -24,7 +24,7 @@
     <!-- Aspire implicit packages must have inline versions when CPM is repo-wide -->
     <PackageReference Include="Aspire.Hosting.AppHost" Version="13.6.1" />
     <!-- Orchestration and Dashboard SDK are automatically provided by Aspire SDK, removed explicit references to fix NU1504 -->
-    <PackageReference Include="KubernetesClient" Version="19.0.2" />
+    <PackageReference Include="KubernetesClient" Version="21.0.8" />
     <!-- Explicit override for vulnerable transitive MessagePack brought by KubernetesClient + Aspire/StreamJsonRpc (>=2.5.302 required) -->
     <PackageReference Include="MessagePack" Version="3.1.11" />
     <PackageReference Include="Microsoft.SourceLink.GitHub" Version="10.0.401">