test: ensure that mocks are setup in isolation on each test

packages/create-cloudflare/src/__tests__/templates.test.ts

@@ -23,7 +23,7 @@ describe("addWranglerToGitIgnore", () => {
 		content: string | undefined;
 	} = { file: undefined, content: undefined };
 
-	beforeAll(() => {
+	beforeEach(() => {
 		vi.mocked(writeFile).mockImplementation((file: string, content: string) => {
 			writeFileResults.file = file;
 			writeFileResults.content = content;