chore: use github's shared prettier-config

__fixtures__/core.ts

@@ -1,5 +1,5 @@
 import type * as core from '@actions/core'
-import { vi } from 'vitest'
+import {vi} from 'vitest'
 
 export const debug = vi.fn<typeof core.debug>()
 export const error = vi.fn<typeof core.error>()

__fixtures__/prompts/json-schema.prompt.yml

@@ -1,7 +1,6 @@
 messages:
   - role: system
-    content:
-      You are a helpful assistant that describes animals using JSON format
+    content: You are a helpful assistant that describes animals using JSON format
   - role: user
     content: |-
       Describe a {{animal}}

__fixtures__/wait.ts

@@ -1,3 +1,3 @@
-import { vi } from 'vitest'
+import {vi} from 'vitest'
 
 export const wait = vi.fn<typeof import('../src/wait.js').wait>()