netlabel: Correct spelling in netlabel.h

Correct spelling in netlabel.h.
As reported by codespell.

Cc: Paul Moore <paul@paul-moore.com>
Signed-off-by: Simon Horman <horms@kernel.org>
Link: https://patch.msgid.link/20240822-net-spell-v1-7-3a98971ce2d2@kernel.orgSigned-off-by: Jakub Kicinski <kuba@kernel.org>

include/net/netlabel.h

@@ -30,7 +30,7 @@ struct calipso_doi;
 
 /*
  * NetLabel - A management interface for maintaining network packet label
- *            mapping tables for explicit packet labling protocols.
+ *            mapping tables for explicit packet labeling protocols.
  *
  * Network protocols such as CIPSO and RIPSO require a label translation layer
  * to convert the label on the packet into something meaningful on the host