Bump pug from 2.0.0-rc.4 to 3.0.3 in /tko.io

Bumps [pug](https://github.com/pugjs/pug) from 2.0.0-rc.4 to 3.0.3.
- [Release notes](https://github.com/pugjs/pug/releases)
- [Commits](https://github.com/pugjs/pug/compare/pug@2.0.0-rc.4...pug@3.0.3)

---
updated-dependencies:
- dependency-name: pug
  dependency-type: direct:production
...

Signed-off-by: dependabot[bot] <support@github.com>

tko.io/package.json

@@ -13,6 +13,6 @@
     "js-yaml": "^3.10.0",
     "lodash.debounce": "^4.0.8",
     "markdown-it": "^8.4.0",
-    "pug": "^2.0.0-rc.4"
+    "pug": "^3.0.3"
   }
 }