chore(deps): update dependency kubernetesclient to v18

Author: renovate[bot]

example/MyFirstKubewardenPolicy.Tests/MyFirstKubewardenPolicy.Tests.csproj

@@ -17,7 +17,7 @@
   </ItemGroup>
 
   <ItemGroup>
-    <PackageReference Include="KubernetesClient" Version="17.0.14" />
+    <PackageReference Include="KubernetesClient" Version="18.0.5" />
     <ProjectReference Include="..\MyFirstKubewardenPolicy\MyFirstKubewardenPolicy.csproj" />
     <ProjectReference Include="..\..\src\KubewardenPolicySDK\KubewardenPolicySDK.csproj" />
   </ItemGroup>

example/MyFirstKubewardenPolicy/MyFirstKubewardenPolicy.csproj

@@ -9,7 +9,7 @@
   </PropertyGroup>
 
   <ItemGroup>
-    <PackageReference Include="KubernetesClient" Version="17.0.14" />
+    <PackageReference Include="KubernetesClient" Version="18.0.5" />
     <PackageReference Include="System.Runtime" Version="4.3.1" />
     <PackageReference Include="WapcGuest" Version="0.1.1" />
     <PackageReference Include="Wasi.Sdk" Version="0.1.1" />