Bump @types/markdown-it-footnote from 3.0.3 to 3.0.4 (sass#947)

Bumps [@types/markdown-it-footnote](https://github.com/DefinitelyTyped/DefinitelyTyped/tree/HEAD/types/markdown-it-footnote) from 3.0.3 to 3.0.4.
- [Release notes](https://github.com/DefinitelyTyped/DefinitelyTyped/releases)
- [Commits](https://github.com/DefinitelyTyped/DefinitelyTyped/commits/HEAD/types/markdown-it-footnote)

---
updated-dependencies:
- dependency-name: "@types/markdown-it-footnote"
  dependency-type: direct:development
  update-type: version-update:semver-patch
...

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Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

package.json

@@ -59,7 +59,7 @@
     "@types/lodash": "^4.14.202",
     "@types/markdown-it": "^13.0.7",
     "@types/markdown-it-attrs": "^4.1.3",
-    "@types/markdown-it-footnote": "^3.0.3",
+    "@types/markdown-it-footnote": "^3.0.4",
     "@types/node": "^16",
     "@types/pako": "^2.0.3",
     "@types/prismjs": "^1.26.3",