test(FontBufferCache): change mock fetcher type

src/entities/Font/model/store/appliedFontsStore/fontBufferCache/FontBufferCache.test.ts

@@ -15,7 +15,7 @@ const makeFetcher = (overrides: Partial<Response> = {}) =>
 
 describe('FontBufferCache', () => {
     let cache: FontBufferCache;
-    let fetcher: ReturnType<typeof vi.fn>;
+    let fetcher: ReturnType<typeof makeFetcher>;
 
     beforeEach(() => {
         fetcher = makeFetcher();