scripts: kernel-doc: Clarify missing struct member description

The output "or member" should be more specific, instead saying "struct
member".

Cc: Jonathan Corbet <corbet@lwn.net>
Cc: linux-doc@vger.kernel.org
Signed-off-by: Kees Cook <keescook@chromium.org>
Signed-off-by: Jonathan Corbet <corbet@lwn.net>
Link: https://lore.kernel.org/r/20231215001513.work.563-kees@kernel.org

scripts/kernel-doc

@@ -1601,7 +1601,7 @@ sub push_parameter($$$$$) {
 		$parameterdescs{$param} = $undescribed;
 
 	        if (show_warnings($type, $declaration_name) && $param !~ /\./) {
-			emit_warning("${file}:$.", "Function parameter or member '$param' not described in '$declaration_name'\n");
+			emit_warning("${file}:$.", "Function parameter or struct member '$param' not described in '$declaration_name'\n");
 		}
 	}