doc/userguide: give pcre1 to pcre2 proper heading

diff --git a/doc/userguide/rules/payload-keywords.rst b/doc/userguide/rules/payload-keywords.rst
index bf456698aa33a86d9c744cf9a953403e84c207a9..2e92b70462696560a34a6cb72779194cb35a62c6 100644 (file)
--- a/doc/userguide/rules/payload-keywords.rst
+++ b/doc/userguide/rules/payload-keywords.rst
@@ -836,7 +836,7 @@ Suricata has its own specific pcre modifiers. These are:
 .. _pcre-update-v1-to-v2:
 
 Changes from PCRE1 to PCRE2
-===========================
+~~~~~~~~~~~~~~~~~~~~~~~~~~~
 
 The upgrade from PCRE1 to PCRE2 changes the behavior for some
 PCRE expressions.