Update doc/source/operations/cloudkitty.rst

Co-authored-by: Michał Nasiadka <michal@stackhpc.com>

Author: MoteHue

doc/source/operations/cloudkitty.rst

@@ -5,7 +5,7 @@ CloudKitty
 Configuring in kayobe-config
 ============================
 
-By default, CloudKitty uses Gnocci and Ceilometer as the collector and fetcher
+By default, CloudKitty uses Gnocchi and Ceilometer as the collector and fetcher
 backends. Unless the system has a specific reason not to, we recommend instead
 using Prometheus as the backend for both. The following instructions explain
 how to do this