update proxy header name

Author: safihamid

src/WebJobs.Script/ScriptConstants.cs

@@ -63,7 +63,7 @@ public static class ScriptConstants
         public const string DynamicSku = "Dynamic";
         public const string DefaultProductionSlotName = "production";
 
-        public const string AzureProxyFunctionLocalRedirectHeaderName = "X_PROXY_LOCAL_REDIRECT_COUNT";
+        public const string AzureProxyFunctionLocalRedirectHeaderName = "X-PROXY-LOCAL-REDIRECT-COUNT";
         public const int AzureProxyFunctionMaxLocalRedirects = 10;
 
         public const string FeatureFlagDisableShadowCopy = "DisableShadowCopy";