devel/electron26: update to 26.6.6
Changelog: https://github.com/electron/electron/releases/tag/v26.6.6
Reported by: GitHub (watch releases)
MFH: 2024Q1
Security: a8326b61-eda0-4c03-9a5b-49ebd8f41c1a
(cherry picked from commit 7a0e0f6d31e56588833db46e62b5496aff233632)