Incorrect .NET variable name CONFIGURATION_KEYS

[dkempkes]

URL of the docs page

docs/daprdocs/content/en/developing-applications/building-blocks/configuration/howto-manage-configuration.md

Line 266 in dea27c7

var CONFIGURATION_KEYS = new List<string> { "orderId1", "orderId2" };

How is it currently worded?
var CONFIGURATION_KEYS = new List { "orderId1", "orderId2" };

How should it be worded?
var CONFIGURATION_ITEMS = new List { "orderId1", "orderId2" };

Additional context
The variable CONFIGURATION_ITEMS is used throughout the document, but it's declared as CONFIGURATION_KEYS in the .NET example.

[msfussell]

@dkempkes - Could you review this PR? Thanks