Apply suggestions from code review

Author: JounQin

flat.d.ts

@@ -4,4 +4,4 @@ declare const eslintConfigPrettierFlat: typeof eslintConfigPrettier & {
   name: "config-prettier";
 };
 
-export = eslintConfigPrettierFlat;
+export = eslintConfigPrettierFlat;

index.d.ts

@@ -2,4 +2,4 @@ declare const eslintConfigPrettier: {
     rules: Record<string, 0 | "off">;
   };
 
-export = eslintConfigPrettier;
+export = eslintConfigPrettier;