annotations: Fix typo in comment

A comment talking about runtime related annotations describes them as
being related to the agent. A similar comment for the agent
annotations is missing.

Fixes: #3004

Signed-off-by: Christophe de Dinechin <dinechin@redhat.com>

virtcontainers/pkg/annotations/annotations.go

@@ -208,7 +208,7 @@ const (
 	BlockDeviceCacheNoflush = kataAnnotHypervisorPrefix + "block_device_cache_noflush"
 )
 
-// Agent related annotations
+// Runtime related annotations
 const (
 	kataAnnotRuntimePrefix = kataConfAnnotationsPrefix + "runtime."
 
@@ -229,6 +229,7 @@ const (
 	DisableNewNetNs = kataAnnotRuntimePrefix + "disable_new_netns"
 )
 
+// Agent related annotations
 const (
 	kataAnnotAgentPrefix = kataConfAnnotationsPrefix + "agent."