Fix HashDelete return value documentation (#2599)

fix #2596

Author: adamjez

src/StackExchange.Redis/Interfaces/IDatabase.cs

@@ -300,7 +300,7 @@ public interface IDatabase : IRedis, IDatabaseAsync
         /// <param name="key">The key of the hash.</param>
         /// <param name="hashField">The field in the hash to delete.</param>
         /// <param name="flags">The flags to use for this operation.</param>
-        /// <returns>The number of fields that were removed.</returns>
+        /// <returns><see langword="true"/> if the field was removed.</returns>
         /// <remarks><seealso href="https://redis.io/commands/hdel"/></remarks>
         bool HashDelete(RedisKey key, RedisValue hashField, CommandFlags flags = CommandFlags.None);
 

src/StackExchange.Redis/Interfaces/IDatabaseAsync.cs

@@ -287,7 +287,7 @@ public interface IDatabaseAsync : IRedisAsync
         /// <param name="key">The key of the hash.</param>
         /// <param name="hashField">The field in the hash to delete.</param>
         /// <param name="flags">The flags to use for this operation.</param>
-        /// <returns>The number of fields that were removed.</returns>
+        /// <returns><see langword="true"/> if the field was removed.</returns>
         /// <remarks><seealso href="https://redis.io/commands/hdel"/></remarks>
         Task<bool> HashDeleteAsync(RedisKey key, RedisValue hashField, CommandFlags flags = CommandFlags.None);