Update capabilities.py (#23879)

Fixes issue when using python3 interpreter: 'filter' object has no attribute 'append'
Ensure list type of data is used before appending data.

lib/ansible/modules/system/capabilities.py

@@ -94,7 +94,7 @@ class CapabilitiesModule(object):
                 self.module.exit_json(changed=True, msg='capabilities changed')
             else:
                 # remove from current cap list if it's already set (but op/flags differ)
-                current = filter(lambda x: x[0] != self.capability_tup[0], current)
+                current = list(filter(lambda x: x[0] != self.capability_tup[0], current))
                 # add new cap with correct op/flags
                 current.append( self.capability_tup )
                 self.module.exit_json(changed=True, state=self.state, msg='capabilities changed', stdout=self.setcap(self.path, current))