Update runtests.sh

Author: HaoK

eng/helix/content/runtests.sh

@@ -43,7 +43,7 @@ if [ -f "$PLAYWRIGHT_DRIVER_PATH" ]; then
     echo "chmod +x $PLAYWRIGHT_DRIVER_PATH"
     chmod +x $PLAYWRIGHT_DRIVER_PATH
     echo "chmod +x $PLAYWRIGHT_NODE_PATH"
-    chmod +x PLAYWRIGHT_NODE_PATH
+    chmod +x $PLAYWRIGHT_NODE_PATH
 fi
 
 RESET="\033[0m"