index.mdx: Add missing word

Add "to" before "Unikraft".

Signed-off-by: Mihnea-Ioan Firoiu <[email protected]>

content/docs/concepts/index.mdx

@@ -7,7 +7,7 @@ description: |
   different compared to containers and traditional VMs.
 ---
 
-In the following sections, we detail the major concepts that are relevant
+In the following sections, we detail the major concepts that are relevant to
 Unikraft.  This text serves to fully conceptualize all information to help you
 understand the reasoning behind Unikraft's design and implementation, as well as
 serve as reference for its architecture.