Change some =head1 to apidoc_section lines

apidoc_section is slightly favored over head1, as it is known only to
autodoc, and can't be confused with real pod.

1 files changed, 1 insertions, 1 deletions

diff --git a/regexec.c b/regexec.c
index e763c0a6ab..91fb3d2eea 100644
--- a/regexec.c
+++ b/regexec.c
@@ -10700,7 +10700,7 @@ Perl_is_grapheme(pTHX_ const U8 * strbeg, const U8 * s, const U8 * strend, const
 }
 
 /*
-=head1 Unicode Support
+=for apidoc_section Unicode Support
 
 =for apidoc isSCRIPT_RUN