net/krakend-ce: Update 2.11.1 => 2.11.2

Changelogs:

• https://github.com/krakend/krakend-ce/releases/tag/v2.11.2
• https://github.com/krakend/krakend-ce/compare/v2.11.1...v2.11.2

Approved by: yuri@ (Mentor)
Differential Revision: https://reviews.freebsd.org/D53157