feat: upgrade eslint-plugin-html from 6.2.0 to 7.1.0

Snyk has created this PR to upgrade eslint-plugin-html from 6.2.0 to 7.1.0.

See this package in npm:
https://www.npmjs.com/package/eslint-plugin-html

See this project in Snyk:
https://app.snyk.io/org/woodpile37/project/044862aa-1005-4f2f-af06-341513c0e0a2?utm_source=github&utm_medium=referral&page=upgrade-pr

Author: snyk-bot

frontend/package.json

@@ -33,7 +33,7 @@
     "eslint-config-standard": "^17.1.0",
     "eslint-loader": "^4.0.0",
     "eslint-plugin-fetch-options": "0.0.5",
-    "eslint-plugin-html": "^6.2.0",
+    "eslint-plugin-html": "^7.1.0",
     "eslint-plugin-mozilla": "^3.1.0",
     "eslint-plugin-no-unsanitized": "^4.0.1",
     "eslint-plugin-prettier": "^5.0.0",