www/chromium: update to 139.0.7258.66

* 139.0.7258.66
This update includes 12 security fixes. Below, we highlight fixes
that were contributed by external researchers. Please see the
Chrome Security Page for more information.
[$2000][414760982] Medium CVE-2025-8576: Use after free in Extensions.
Reported by asnine on 2025-04-30
[$1000][384050903] Medium CVE-2025-8577: Inappropriate implementation
in Picture In Picture. Reported by Umar Farooq on 2024-12-14
[TBD][423387026] Medium CVE-2025-8578: Use after free in Cast.
Reported by Fayez on 2025-06-09
[$10000][407791462] Low CVE-2025-8579: Inappropriate implementation in
Gemini Live in Chrome. Reported by Alesandro Ortiz on 2025-04-02
[$2000][411544197] Low CVE-2025-8580: Inappropriate implementation in
Filesystems. Reported by Huuuuu on 2025-04-18
[$2000][416942878] Low CVE-2025-8581: Inappropriate implementation in
Extensions. Reported by Vincent Dragnea on 2025-05-11
[$1000][40089450] Low CVE-2025-8582: Insufficient validation of
untrusted input in DOM. Reported by Anonymous on 2017-10-31
[$500][373794472] Low CVE-2025-8583: Inappropriate implementation in
Permissions. Reported by Shaheen Fazim on 2024-10-16
