build(deps): bump marked from 1.2.7 to 1.2.8

Bumps [marked](https://github.com/markedjs/marked) from 1.2.7 to 1.2.8.
- [Release notes](https://github.com/markedjs/marked/releases)
- [Changelog](https://github.com/markedjs/marked/blob/master/release.config.js)
- [Commits](markedjs/marked@v1.2.7...v1.2.8)

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

package.json

@@ -43,7 +43,7 @@
     "jstransformer-handlebars": "^1.1.0",
     "junk": "^3.1.0",
     "lodash.defaultsdeep": "^4.6.1",
-    "marked": "^1.2.7",
+    "marked": "^1.2.8",
     "metalsmith": "^2.3.0",
     "metalsmith-collections": "^0.9.0",
     "metalsmith-discover-helpers": "^0.1.1",