MULTIPASS.md: Fix typo

Remove extra "P" in "contents"

Signed-off-by: Gianpaolo Macario <[email protected]>

docs/MULTIPASS.md

@@ -40,7 +40,7 @@ It took me about 2-3 minutes to run through everything after installing multipas
     sed "s/ssh-rsa.*/$(cat $HOME/.ssh/id_*.pub)/" cloud-config.txt | multipass launch --name faasd --cloud-init -
     ```
 
-    This can also be done manually, just replace the 2nd line of the `cloud-config.txt` with the coPntents of your public ssh key, usually either `~/.ssh/id_rsa.pub` or `~/.ssh/id_ed25519.pub`
+    This can also be done manually, just replace the 2nd line of the `cloud-config.txt` with the contents of your public ssh key, usually either `~/.ssh/id_rsa.pub` or `~/.ssh/id_ed25519.pub`
 
     ```
     ssh_authorized_keys: