fix typo

instruction = "turn the red part to many star"

before:
```
task: (referring editing), source: [dot], target: <many stars>.
```

after
```
task: (referring editing), source: [the red part], target: <many stars>.
```

tasks/ref_in_gpt3.py

@@ -37,7 +37,7 @@ prompts.append("instruction: remove the dog on the left side, task: (referring e
 prompts.append("instruction: change the apple to a pear, task: (referring editing), source: [apple], target: <pear>.")
 prompts.append("instruction: change the red apple to a green one, task: (referring editing), source: [red apple], target: <green apple>.")
 prompts.append("instruction: change the color of bird's feathers from white to blue, task: (referring editing), source: [white bird], target: <blue bird>.")
-prompts.append("instruction: replace the dog with a cat, task: (referring editing), source: [dot], target: <cat>.")
+prompts.append("instruction: replace the dog with a cat, task: (referring editing), source: [dog], target: <cat>.")
 prompts.append("instruction: replace the red apple with a green one, task: (referring editing), source: [red apple], target: <green apple>.")
 
 openai.api_type = "azure"