www/element-web: Update to 1.11.8

Approved by: maintainer (implicit, version bump, as per PR 258262)
MFH: 2022Q3
Security: cb902a77-3f43-11ed-9402-901b0e9408dc
Security: CVE-2022-39249
Security: CVE-2022-39250
Security: CVE-2022-39251
Security: CVE-2022-39236

(cherry picked from commit b96a95b32b51472e7bce773936637b6bf7618067)