Base: Make /bin/Shell the login shell by default

Author: https://github.com/boricj
Commit: https://github.com/SerenityOS/serenity/commit/b1add5860bc
Pull-request: https://github.com/SerenityOS/serenity/pull/9345

Base/etc/passwd

@@ -1,6 +1,6 @@
-root::0:0:root:/root:/bin/sh
+root::0:0:root:/root:/bin/Shell
 lookup:!:10:10:LookupServer,,,:/:/bin/false
 window:!:13:13:WindowServer,,,:/:/bin/false
 sshd:!:19:19:OpenSSH privsep,,,:/:/bin/false
-anon:!:100:100:Anonymous,,,:/home/anon:/bin/sh
-nona:!:200:200:Nona,,,:/home/nona:/bin/sh
+anon:!:100:100:Anonymous,,,:/home/anon:/bin/Shell
+nona:!:200:200:Nona,,,:/home/nona:/bin/Shell