runtime(doc): clarify the use of filters and external commands

related: #16044

Signed-off-by: Christian Brabandt <cb@256bit.org>
diff --git a/runtime/doc/change.txt b/runtime/doc/change.txt
index 785f4ac..e436655 100644
--- a/runtime/doc/change.txt
+++ b/runtime/doc/change.txt
@@ -1,4 +1,4 @@
-*change.txt*    For Vim version 9.1.  Last change: 2024 Oct 07
+*change.txt*    For Vim version 9.1.  Last change: 2024 Nov 12
 
 
 		  VIM REFERENCE MANUAL    by Bram Moolenaar
@@ -586,6 +586,8 @@
 			program {filter} (for {Visual} see |Visual-mode|).
 
 :{range}![!]{filter} [!][arg]				*:range!*
+			For executing external commands see |:!|
+
 			Filter {range} lines through the external program
 			{filter}.  Vim replaces the optional bangs with the
 			latest given command and appends the optional [arg].