edit installing_nvidia_gpu_drivers.md (#2674)

* formatting of fenced code block within admonition

Author: sspencerwire

docs/desktop/display/installing_nvidia_gpu_drivers.md

@@ -90,12 +90,14 @@ sudo grubby --args="nouveau.modeset=0 rd.driver.blacklist=nouveau" --update-kern
 !!! Note
 
     For systems with secure boot enabled you need to perform this step:
+
     ```bash
     sudo mokutil --import /var/lib/dkms/mok.pub
     ```
+
     The `mokutil` command will prompt for you to make up a password, which will be used during reboot.
 
-    After the reboot, your system should ask you if you want to enroll a key or something like that, say yes and it asks for the password you gave in the `mokutil` command.
+    After the reboot, your system should ask you if you want to enroll a key or something like that, say "yes" and it asks for the password you gave in the `mokutil` command.
 
 Reboot: