enhancement: grammar

Author: zedaes

app/(wiki)/weapons/throwables/articles/frag_grenade.md

@@ -40,7 +40,7 @@ This is a special technique that abuses the behavior of frag grenades pushing ot
 
 ## Countering
 - Move away from the grenade to avoid as much damage as possible.
-  - This is usually not a challenge but can be if you are in an enclosed space or your opponent times their grenade well.
+  - This is usually not a challenge, but can be if you are in an enclosed space or your opponent times their grenade well.
 - If your opponent utilizes "grenade spamming", you can try to rush forward and out-DPS them at close range using a weapon such as the [Flues](/weapons/guns/flues).