deps: bump minimum ICU version to 69

Refs: https://github.com/v8/v8/commit/edac49681843447cc483b164a26d00755870b08c

PR-URL: https://github.com/nodejs/node/pull/38990


Reviewed-By: Jiawen Geng <technicalcute@gmail.com>
Reviewed-By: Matteo Collina <matteo.collina@gmail.com>
Reviewed-By: Robert Nagy <ronagy@icloud.com>
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>