update csproj description

Author: phnx47

src/Prometheus.Client.DependencyInjection.csproj

@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
     <TargetFrameworks>netstandard2.0;net6.0;net8.0</TargetFrameworks>
-    <Description>DependencyInjection support for the Prometheus.Client</Description>
+    <Description>Dependency Injection extensions for Prometheus.Client</Description>
     <RepositoryUrl>https://github.com/prom-client-net/prom-client-dependencyinjection</RepositoryUrl>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
   </PropertyGroup>