qapi/common: Supply missing member documentation

Since we neglect to document the members of GrabToggleKeys, their
description in the QEMU QMP Reference manual is "Not documented".  Fix
that.

Signed-off-by: Markus Armbruster <armbru@redhat.com>
Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Message-ID: <20240911112545.2248881-3-armbru@redhat.com>

qapi/common.json

@@ -183,7 +183,19 @@
 ##
 # @GrabToggleKeys:
 #
-# Keys to toggle input-linux between host and guest.
+# Key combinations to toggle input-linux between host and guest.
+#
+# @ctrl-ctrl: left and right control key
+#
+# @alt-alt: left and right alt key
+#
+# @shift-shift: left and right shift key
+#
+# @meta-meta: left and right meta key
+#
+# @scrolllock: scroll lock key
+#
+# @ctrl-scrolllock: either control key and scroll lock key
 #
 # Since: 4.0
 ##

qapi/pragma.json

@@ -52,7 +52,6 @@
         'DummyBlockCoreForceArrays',
         'DummyForceArrays',
         'DummyVirtioForceArrays',
-        'GrabToggleKeys',
         'HotKeyMod',
         'ImageInfoSpecificKind',
         'InputAxis',