fix locale: replace deprecated function

abra.sh

@@ -16,7 +16,7 @@ core_install(){
     chown www-data:www-data /var/www/html/wp-content
     wp "core install --url=$DOMAIN --title=\"$TITLE\" --admin_user=$ADMIN --admin_email=$ADMIN_EMAIL --locale=$LOCALE --skip-email"
     wp "language core install $LOCALE"
-    wp "language core activate $LOCALE"
+    wp "site switch-language $LOCALE"
     wp "rewrite structure '/%year%/%monthnum%/%day%/%postname%/'"
 }