Enforce using utf-8 instead of utf8 via ESLint

Author: mcecode

eslint.config.js

@@ -120,8 +120,7 @@ export default defineConfig([
 			"unicorn/import-style": "off",
 			"unicorn/no-await-expression-member": "off",
 			"unicorn/prevent-abbreviations": "off",
-			// I actually want the opposite, always use `utf-8`.
-			"unicorn/text-encoding-identifier-case": "off",
+			"unicorn/text-encoding-identifier-case": ["error", { withDash: true }],
 		},
 	},
 	{