fix: use valid config type for supporting both ESLint v8 and v9 (#976)

Signed-off-by: Gareth Jones <Jones258@Gmail.com>

Author: G-Rath

index.d.ts

@@ -12,12 +12,12 @@ declare const plugin: {
 		react: Linter.LegacyConfig;
 		svelte: Linter.LegacyConfig;
 		vue: Linter.LegacyConfig;
-		'flat/angular': Linter.Config<Linter.RulesRecord>;
-		'flat/dom': Linter.Config<Linter.RulesRecord>;
-		'flat/marko': Linter.Config<Linter.RulesRecord>;
-		'flat/react': Linter.Config<Linter.RulesRecord>;
-		'flat/svelte': Linter.Config<Linter.RulesRecord>;
-		'flat/vue': Linter.Config<Linter.RulesRecord>;
+		'flat/angular': Linter.FlatConfig;
+		'flat/dom': Linter.FlatConfig;
+		'flat/marko': Linter.FlatConfig;
+		'flat/react': Linter.FlatConfig;
+		'flat/svelte': Linter.FlatConfig;
+		'flat/vue': Linter.FlatConfig;
 	};
 	rules: {
 		[key: string]: Rule.RuleModule;