fix typo

oh-my-zsh.sh

@@ -14,7 +14,7 @@ if [[ -z "$ZSH_CUSTOM" ]]; then
     ZSH_CUSTOM="$ZSH/custom"
 fi
 
-# Set ZSH_CACHE_DIR to the path where cache files sould be created
+# Set ZSH_CACHE_DIR to the path where cache files should be created
 # or else we will use the default cache/
 if [[ -z "$ZSH_CACHE_DIR" ]]; then
   ZSH_CACHE_DIR="$ZSH/cache/"