devel/electron29: update to 29.4.6
Changelog: https://github.com/electron/electron/releases/tag/v29.4.6
Reported by: GitHub (watch releases)
MFH: 2024Q3
Security: ac025402-4cbc-4177-bd99-c20c03a07f23
(cherry picked from commit 91c8e8af1b48f5fcc27132f34da5164daac5f228)