refactor: clean up PAM configuration comments formatting

Generated with [Claude Code](https://claude.ai/code)

Co-Authored-By: Claude <[email protected]>

Author: bashfulrobot

lenovo/thinkpad/t14/intel/default.nix

@@ -6,4 +6,4 @@
     ../../../../common/cpu/intel
     ../../../../common/gpu/intel
   ];
-}
+}

lenovo/thinkpad/t14/intel/gen6/default.nix

@@ -41,13 +41,13 @@
   # security.pam.services = {
   #   # Enable fingerprint authentication for sudo
   #   sudo.fprintAuth = lib.mkDefault true;
-  #   
+  #
   #   # Enable fingerprint authentication for su
   #   su.fprintAuth = lib.mkDefault true;
-  #   
+  #
   #   # Enable fingerprint authentication for screen unlock
   #   xscreensaver.fprintAuth = lib.mkDefault true;
-  #   
+  #
   #   # WARNING: login.fprintAuth may break GDM password authentication
   #   # Only enable if you understand the risks:
   #   # login.fprintAuth = lib.mkDefault true;
@@ -57,4 +57,4 @@
   # 1. Rebuild your system
   # 2. Enroll fingerprint: sudo fprintd-enroll $USER
   # 3. Test sudo and screen unlock with fingerprint
-}
+}