Update Readme.md (#34)

CosmosDBSessionStateProviderAsync's config should say `partitionKeyPath`. Wrong name would result in partition not enabled.

Author: qxx

Readme.md

@@ -64,7 +64,7 @@ Before you can specify one of these custom providers. You need to remove the exi
       <providers>
         <add name="CosmosDBSessionStateProviderAsync" cosmosDBEndPointSettingKey="cosmosDBEndPointSetting" cosmosDBAuthKeySettingKey="cosmosDBAuthKeySetting"
           databaseId="[DataBaseId]" collectionId="[CollectionId]" offerThroughput="5000" connectionMode="Direct" connectionProtocol="Tcp" requestTimeout="5"
-          maxConnectionLimit="50" maxRetryAttemptsOnThrottledRequests="10" maxRetryWaitTimeInSeconds="10" preferredLocations="" partitionKey="pKey"
+          maxConnectionLimit="50" maxRetryAttemptsOnThrottledRequests="10" maxRetryWaitTimeInSeconds="10" preferredLocations="" partitionKeyPath="pKey"
           partitionNumUsedByProvider="*"
           type="Microsoft.AspNet.SessionState.CosmosDBSessionStateProviderAsync, Microsoft.AspNet.SessionState.CosmosDBSessionStateProviderAsync, Version=1.1.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35"/>
       </providers>