fix: Typo in scripts (script -> scripts directory).

Author: chrisrng

scripts/checkout-opticss-and-link.sh

@@ -5,5 +5,5 @@ if [[ -z "$OPTICSS_DIR" ]];
 then
   OPTICSS_DIR=build/opticss
 fi
-./script/checkout-opticss.sh $OPTICSS_DIR
+./scripts/checkout-opticss.sh $OPTICSS_DIR
 ./scripts/link-to-opticss.js $OPTICSS_DIR