www/element-web: Update to 1.11.26

Approved by: maintainer (implicit, version bump, as per PR 258262)
MFH: 2023Q1
Security: 5b0ae405-cdc7-11ed-bb39-901b0e9408dc
Security: CVE-2023-28103
Security: CVE-2023-28427

(cherry picked from commit d84c4ab5c918cee0e1625d3bbb4c0cf7f8b4d7a8)