Bump Prometheus.Client.DependencyInjection to 1.6.0 (#156)

Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>

Author: renovate[bot]

Directory.Packages.props

@@ -4,7 +4,7 @@
   </PropertyGroup>
   <ItemGroup>
     <PackageVersion Include="Prometheus.Client" Version="6.1.0" />
-    <PackageVersion Include="Prometheus.Client.DependencyInjection" Version="1.5.1" />
+    <PackageVersion Include="Prometheus.Client.DependencyInjection" Version="1.6.0" />
     <PackageVersion Include="Prometheus.Client.AspNetCore" Version="6.0.0" />
     <PackageVersion Include="Prometheus.Client.HttpRequestDurations" Version="4.0.0" />
     <PackageVersion Include="Prometheus.Client.HealthChecks" Version="2.1.1" />