www/angie-module-headers-more: Update 0.37 => 0.38

Changelog:
https://github.com/openresty/headers-more-nginx-module/releases/tag/v0.38

PR: 287316
Approved by: oleg@mamontov.net (maintainer, timeout 2 weeks)
MFH: 2025Q2

(cherry picked from commit acd5d1155d78ce772150b527e9eeb9ae69053b62)