[ThinkAuth](https://auth.sys.thinkhead.org/) to 2025.4.1 and 2025.6.4, to [mitigate Bitnamigate](htt

Tracking ticket for a line in release 5.1.8.8 that shipped without one.

Upgraded ThinkAuth to 2025.4.1 and 2025.6.4, to mitigate Bitnamigate [9].

Created retroactively so every changelog line has a ticket a reader can follow.