README: clarify each developer reads credentials from their own tablet's GPLv3 screen

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

README.md

@@ -68,8 +68,11 @@ scripts/install-launcher.sh    # installs the persistent 4-finger return launche
 
 `scripts/restore-xochitl.sh` returns to the standard reMarkable GUI at any time.
 
-> The tablet's actual root password / IPs are **not** in this repo (they live in
-> the gitignored `doc/tablet_access.md`) — get them from Andreas.
+> Each tablet has its **own** root password, IP, and MAC, shown on **its own**
+> Copyright-and-licenses → GPLv3 Compliance screen (see step 1.3). Read them off
+> *your* tablet — nothing about credentials comes from this repo or from anyone
+> else. (`doc/tablet_access.md` is gitignored and is only a developer's private
+> copy of their own tablet's screen.)
 
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