Bump memfs from 4.6.0 to 4.7.7

Bumps [memfs](https://github.com/streamich/memfs) from 4.6.0 to 4.7.7.
- [Release notes](https://github.com/streamich/memfs/releases)
- [Changelog](https://github.com/streamich/memfs/blob/master/CHANGELOG.md)
- [Commits](streamich/memfs@v4.6.0...v4.7.7)

---
updated-dependencies:
- dependency-name: memfs
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

package.json

@@ -37,7 +37,7 @@
         "markdown-it": "^14.0.0",
         "markdown-it-anchor": "^8.6.7",
         "markdown-it-footnote": "^4.0.0",
-        "memfs": "^4.6.0",
+        "memfs": "^4.7.7",
         "node-sass": "^9.0.0",
         "npm-run-all": "^4.1.5",
         "svg-sprite": "^2.0.2",