docs: remove step numbers

Numerating steps is not informative and considered bad style
People tend to follow documentation non-linearly
leaving of at one point, starting over from the middle
Documentation should be written in a way that allow for that

docs/site/guides/secure-boot.md

@@ -1,9 +1,11 @@
 At the moment, NixOS/Clan does not support [Secure Boot](https://wiki.gentoo.org/wiki/Secure_Boot). Therefore, you need to disable it in the BIOS. You can watch this [video guide](https://www.youtube.com/watch?v=BKVShiMUePc) or follow the instructions below:
 
-### Step 1: Insert the USB Stick
+## Insert the USB Stick
+
 - Begin by inserting the USB stick into a USB port on your computer.
 
-### Step 2: Access the UEFI/BIOS Menu
+## Access the UEFI/BIOS Menu
+
 - Restart your computer.
 - As your computer restarts, press the appropriate key to enter the UEFI/BIOS settings.
 ??? tip "The key depends on your laptop or motherboard manufacturer. Click to see a reference list:"
@@ -32,18 +34,22 @@ At the moment, NixOS/Clan does not support [Secure Boot](https://wiki.gentoo.org
     !!! Note
         Pressing the key quickly and repeatedly is sometimes necessary to access the UEFI/BIOS menu, as the window to enter this mode is brief.
 
-### Step 3: Access Advanced Mode (Optional)
+## Access Advanced Mode (Optional)
+
 - If your UEFI/BIOS has a `Simple` or `Easy` mode interface, look for an option labeled `Advanced Mode` (often found in the lower right corner).
 - Click on `Advanced Mode` to access more settings. This step is optional, as your boot settings might be available in the basic view.
 
-### Step 4: Disable Secure Boot
+## Disable Secure Boot
+
 - Locate the `Secure Boot` option in your UEFI/BIOS settings. This is typically found under a `Security` tab, `Boot` tab, or a similarly named section.
 - Set the `Secure Boot` option to `Disabled`.
 
-### Step 5: Change Boot Order
+## Change Boot Order
+
 - Find the option to adjust the boot order—often labeled `Boot Order`, `Boot Sequence`, or `Boot Priority`.
 - Ensure that your USB device is set as the first boot option. This allows your computer to boot from the USB stick.
 
-### Step 6: Save and Exit
+## Save and Exit
+
 - Save your changes before exiting the UEFI/BIOS menu. Look for a `Save & Exit` option or press the corresponding function key (often `F10`).
 - Your computer should now restart and boot from the USB stick.