qapi: Fix enumeration typo error

Signed-off-by: Lei Li <lilei@linux.vnet.ibm.com>
Reviewed-by: Luiz Capitulino <lcapitulino@redhat.com>
Signed-off-by: Stefan Hajnoczi <stefanha@gmail.com>

qapi-schema-guest.json

@@ -293,7 +293,7 @@
 ##
 # @GuestFsFreezeStatus
 #
-# An enumation of filesystem freeze states
+# An enumeration of filesystem freeze states
 #
 # @thawed: filesystems thawed/unfrozen
 #

qapi-schema.json

@@ -118,7 +118,7 @@
 ##
 # @RunState
 #
-# An enumation of VM run states.
+# An enumeration of VM run states.
 #
 # @debug: QEMU is running on a debugger
 #
@@ -785,7 +785,7 @@
 ##
 # @SpiceQueryMouseMode
 #
-# An enumation of Spice mouse states.
+# An enumeration of Spice mouse states.
 #
 # @client: Mouse cursor position is determined by the client.
 #