guides: lava-apertis-testing: Fix typo on code block tag

Signed-off-by: Ariel D'Alessandro <ariel.dalessandro@collabora.com>

content/guides/lava-apertis-testing.md

@@ -457,7 +457,7 @@ isn't actually a test, and is used to add repositories to
 These instructions are written to submit LAVA jobs for **ONLY PUBLIC**
 Apertis images. If you need to submit a LAVA job for a private image,
 there are few things that need to be taken into consideration and few
-changes need to be made to these instructions: <code>personal<code> or
+changes need to be made to these instructions: <code>personal</code> or
 `group` visibility should be selected for your jobs.
 
 If you really need to submit a private job, please contact the Apertis