Update README.md

Author: craigwardman

README.md

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 # Chunking Redis Client
-A library which wraps the StackExchange.Redis client, specifically using JSON serialisation, and adds functionality such as chunked reading/writing and sliding expiration.
+A C#/.NET Core library which wraps the StackExchange.Redis client, specifically using JSON serialisation, and adds functionality such as chunked reading/writing and sliding expiration.
 
 To install without the source, use the NuGet package:
 https://www.nuget.org/packages/ChunkingRedisClient/