Bump html-validator from 5.1.15 to 5.1.16 (#1614)

Bumps [html-validator](https://github.com/zrrrzzt/html-validator) from 5.1.15 to 5.1.16.
- [Release notes](https://github.com/zrrrzzt/html-validator/releases)
- [Commits](zrrrzzt/html-validator@5.1.15...5.1.16)

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package.json

@@ -61,7 +61,7 @@
     "escape-string-regexp": "^4.0.0",
     "fs-extra": "^9.0.1",
     "fs-walk": "0.0.2",
-    "html-validator": "^5.1.15",
+    "html-validator": "^5.1.16",
     "htmlencode": "0.0.4",
     "lockfile-lint": "^4.3.7",
     "mocha": "^8.1.1",