runtime(doc): update helptags

Signed-off-by: Christian Brabandt <cb@256bit.org>
diff --git a/runtime/doc/tags b/runtime/doc/tags
index 86db8a4..d61bdc7 100644
--- a/runtime/doc/tags
+++ b/runtime/doc/tags
@@ -7384,6 +7384,7 @@
 ft-neomuttrc-syntax	syntax.txt	/*ft-neomuttrc-syntax*
 ft-nroff-syntax	syntax.txt	/*ft-nroff-syntax*
 ft-ocaml-syntax	syntax.txt	/*ft-ocaml-syntax*
+ft-org-plugin	filetype.txt	/*ft-org-plugin*
 ft-pandoc-syntax	syntax.txt	/*ft-pandoc-syntax*
 ft-papp-syntax	syntax.txt	/*ft-papp-syntax*
 ft-pascal-syntax	syntax.txt	/*ft-pascal-syntax*