Bump @mdi/font from 7.1.96 to 7.4.47 in /docs

Bumps [@mdi/font](https://github.com/Templarian/MaterialDesign-Webfont) from 7.1.96 to 7.4.47.
- [Commits](https://github.com/Templarian/MaterialDesign-Webfont/compare/v7.1.96...v7.4.47)

---
updated-dependencies:
- dependency-name: "@mdi/font"
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

docs/package.json

@@ -17,7 +17,7 @@
   },
   "homepage": "https://github.com/google/docsy-example#readme",
   "dependencies": {
-    "@mdi/font": "7.1.96"
+    "@mdi/font": "7.4.47"
   },
   "devDependencies": {
     "autoprefixer": "^10.4.0",