Revert "CI: switch to the "latest" LibreSSL"

This reverts commit aac6ff14dc8f5a5f951cd8285fdc56cf4f1c6f33.

The 2.5 is not compatible with LibreSSL 3.6.x.

(cherry picked from commit ef94861be2d2497d1df1151bfb038afee4fadeee)
Signed-off-by: Christopher Faulet <cfaulet@haproxy.com>
1 file changed