Documentation: Fixed reference to doc/debug-messages.dox file (#1953)

Reported by Matus UHLAR on the squid-users mailing list.
Broken since inception in 2021 commit c59baaa8.

diff --git a/src/cf.data.pre b/src/cf.data.pre
index fbd7446039999cb65e8956bb81d0a456e20f5679..698c9294623ee6e24ea9932c7eaa356b415e59ea 100644 (file)
--- a/src/cf.data.pre
+++ b/src/cf.data.pre
@@ -5718,7 +5718,7 @@ DOC_START
 
        Most messages have _not_ been instrumented to support this directive
        yet. For the list of instrumented messages and their IDs, please see
-       the doc/debug-messages.txt file.
+       the doc/debug-messages.dox file.
 
        Message ID corresponds to the message semantics rather than message
        text or source code location. The ID is stable across Squid