Fix broken CircleCI badge

Author: bwoskow-ld

README.md

@@ -1,6 +1,6 @@
 LaunchDarkly SDK for .NET - Redis integration
 =============================================
-[![CircleCI](https://circleci.com/gh/launchdarkly/dotnet-client-redis.svg?style=svg)](https://circleci.com/gh/launchdarkly/dotnet-client-redis)
+[![CircleCI](https://circleci.com/gh/launchdarkly/dotnet-server-sdk-redis.svg?style=svg)](https://circleci.com/gh/launchdarkly/dotnet-server-sdk-redis)
 
 This library provides a Redis-backed persistence mechanism (feature store) for the [LaunchDarkly .NET SDK](https://github.com/launchdarkly/dotnet-client), replacing the default in-memory feature store. The underlying Redis client implementation is [StackExchange.Redis](https://github.com/StackExchange/StackExchange.Redis).