Fix typo

installer.sh

@@ -12,7 +12,7 @@ if [[ "$1" == "--purge" ]]; then
   echo "[!] This will permanently remove all MediaWiki Appliance components."
   echo "    This will DESTROY a normal system; NEVER run this without exactly"
   echo "    understanding what the purpose is."
-  read -p "Are you sure you want to destory this system? [y/N]: " confirm
+  read -p "Are you sure you want to destroy this system? [y/N]: " confirm
   if [[ "$confirm" != "y" && "$confirm" != "Y" ]]; then
     echo "Aborted."
     exit 1