fix: frontmatter coercion (empty string is falsy)

Jacky Zhao

2023-12-09 2c69b0c97d40f76363d20478cb799ce4b7518e56

 docs/features/explorer.md

@@ -196,7 +196,7 @@
      }
    }
  },
}})
})
```

### Putting it all together