Bump pug from 3.0.0 to 3.0.3 in /example/basic-pug

Bumps [pug](https://github.com/pugjs/pug) from 3.0.0 to 3.0.3.
- [Release notes](https://github.com/pugjs/pug/releases)
- [Commits](https://github.com/pugjs/pug/compare/pug@3.0.0...pug@3.0.3)

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

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

example/basic-pug/package.json

@@ -12,6 +12,6 @@
     "i18next": "19.8.1",
     "i18next-http-middleware": "3.1.4",
     "i18next-fs-backend": "1.0.7",
-    "pug": "3.0.0"
+    "pug": "3.0.3"
   }
 }