[HttpClient & ASP.NET Core] Change metric descriptions as per spec

src/OpenTelemetry.Instrumentation.AspNetCore/Implementation/HttpInMetricsListener.cs

@@ -59,7 +59,7 @@ internal HttpInMetricsListener(string name, Meter meter, AspNetCoreMetricsInstru
 
         if (this.emitNewAttributes)
         {
-            this.httpServerRequestDuration = meter.CreateHistogram<double>(HttpServerRequestDurationMetricName, "s", "Measures the duration of inbound HTTP requests.");
+            this.httpServerRequestDuration = meter.CreateHistogram<double>(HttpServerRequestDurationMetricName, "s", "Duration of HTTP server requests.");
         }
     }
 

src/OpenTelemetry.Instrumentation.Http/Implementation/HttpHandlerMetricsDiagnosticListener.cs

@@ -37,7 +37,7 @@ internal sealed class HttpHandlerMetricsDiagnosticListener : ListenerHandler
     internal static readonly string MeterVersion = AssemblyName.Version.ToString();
     internal static readonly Meter Meter = new(MeterName, MeterVersion);
     private static readonly Histogram<double> HttpClientDuration = Meter.CreateHistogram<double>("http.client.duration", "ms", "Measures the duration of outbound HTTP requests.");
-    private static readonly Histogram<double> HttpClientRequestDuration = Meter.CreateHistogram<double>("http.client.request.duration", "s", "Measures the duration of outbound HTTP requests.");
+    private static readonly Histogram<double> HttpClientRequestDuration = Meter.CreateHistogram<double>("http.client.request.duration", "s", "Duration of HTTP client requests.");
 
     private static readonly PropertyFetcher<HttpRequestMessage> StopRequestFetcher = new("Request");
     private static readonly PropertyFetcher<HttpResponseMessage> StopResponseFetcher = new("Response");