fix: update session retry optmization public doc

Author: dibahlfi

Microsoft.Azure.Cosmos/src/CosmosClientOptions.cs

@@ -747,8 +747,9 @@ public Func<HttpClient> HttpClientFactory
         /// </remarks>
         public AvailabilityStrategy AvailabilityStrategy { get; set; }
 
-        /// <summary>
-        /// provides SessionTokenMismatchRetryPolicy optimization through customer supplied region switch hints
+        /// <summary>
+        /// Provides SessionTokenMismatchRetryPolicy optimization through customer supplied region switch hints which guide SDK-internal retry policies on how early to switch retries to a different region. 
+        /// If true, will retry all replicas once and add a minimum delay before switching to the next region.If false, it will retry in the local region up to 5s
         /// </summary>
 #if PREVIEW
         public

Microsoft.Azure.Cosmos/src/Fluent/CosmosClientBuilder.cs

@@ -584,7 +584,8 @@ public CosmosClientBuilder WithSerializerOptions(CosmosSerializationOptions cosm
         }
 
         /// <summary>
-        /// provides SessionTokenMismatchRetryPolicy optimization through customer supplied region switch hints
+        /// Provides SessionTokenMismatchRetryPolicy optimization through customer supplied region switch hints which guide SDK-internal retry policies on how early to switch retries to a different region. 
+        /// If true, will retry all replicas once and add a minimum delay before switching to the next region.If false, it will retry in the local region up to 5s
         /// </summary>
         /// <param name="enableRemoteRegionPreferredForSessionRetry"></param>
         /// <returns>The <see cref="CosmosClientBuilder"/> object</returns>