add icon

Author: phnx47

src/Prometheus.Client/Prometheus.Client.csproj

@@ -10,6 +10,7 @@
     <AssemblyName>Prometheus.Client</AssemblyName>
     <PackageId>Prometheus.Client</PackageId>
     <PackageTags>prometheus;metrics</PackageTags>
+    <PackageIconUrl>https://image.ibb.co/k4Sc0k/prometheus.png</PackageIconUrl>
     <PackageProjectUrl>https://github.com/phnx47/Prometheus.Client</PackageProjectUrl>
     <PackageLicenseUrl>https://opensource.org/licenses/MIT</PackageLicenseUrl>
     <RepositoryType>git</RepositoryType>