Update scripts/Readme.md

Remove example test password.

Co-authored-by: Copilot <175728472+Copilot@users.noreply.github.com>
Signed-off-by: Liam Girdwood <lgirdwood@gmail.com>

Author: lgirdwood

scripts/Readme.md

@@ -142,7 +142,7 @@ To build for tigerlake:
 ./scripts/docker-run.sh ./scripts/xtensa-build-all.sh -l tgl
 ```
 
-or (may need password test0000 for rimage install)
+or (this command may prompt for a password during rimage installation inside the container)
 
 ```bash
 ./scripts/docker-run.sh ./scripts/xtensa-build-all.sh tgl