Update plug_and_boot.md

This is a translation of FR version.
- Going through the documentation, I had a slight scare because I did not have a screen with me and felt blocked because of that.
- Markdown was disabled for one line

plug_and_boot.md

@@ -2,7 +2,7 @@
 
 * Plug your server in wired Ethernet, or configure the wifi connection as explained [here](https://www.raspberrypi.org/documentation/configuration/wireless/wireless-cli.md). You can also mount the second partition of the SD card and edit the wpa-supplicant.conf file prior to boot the card for the first time - on Windows you can use [Paragon ExtFS](https://www.paragon-software.com/home/extfs-windows/), don't forget to unmount everytime for changes to take effect.
 
-* Do not forget to **plug a screen** if you want to see how boot is going, and a keyboard if you want to have a **command-line access** to your server.
+* Optional : You can **plug a screen** if you want to see how boot is going, and a keyboard if you want to have a **command-line access** to your server.
 
 * Power up the server, wait for the first reboot to happen, and then wait until you see a big squared `Y` :
 
@@ -10,8 +10,7 @@
 
 <div class="text-center"><img src="/images/boot_screen.png">
 
-<p markdown="1">
 *Write down the `IP address` field visible on the screen: It is your server's **local IP address**.*
-</p>
 
 </div>
+Don't worry if you don't have a screen ! You can still find you IP address in the next step.