fix broken werk

this id was already used for another werk.

Change-Id: I61628c2b49b0d4f5d476dfe94a36b48cee5700cc

Author: BenediktSeidl

.werks/18300.md

@@ -18,4 +18,4 @@ regex compile, the code fell through to hostname validation, which
 rightfully refused the regex as a host name.
 
 Valid regex patterns are now accepted again. Invalid ones still produce
-a clear error message, as intended by werk #18988.
+a clear error message, as intended by werk #18491.