[BUG]Fix missing import from code snippet video_text_to_text task page
Author: SoyGema
Pull request: yes

Fixes missing import in code snippet from video_text_to_text[ transformers](https://huggingface.co/docs/transformers/tasks/video_text_to_text) task page

Fix #34060 

# What does this PR do?

Adds an import that prevents the following error from the following code snippet 

```
import uuid
import requests
import cv2

def replace_video_with_images(text, frames):
  return text.replace("<video>", "<image>" * frames)

def sample_frames(url, num_frames):

    response = requests.get(url)
    path_id = str(uuid.uuid4())

    path = f"./{path_id}.mp4" 

    with open(path, "wb") as f:
      f.write(response.content)

    video = cv2.VideoCapture(path)
    total_frames = int(video.get(cv2.CAP_PROP_FRAME_COUNT))
    interval = total_frames // num_frames
    frames = []
    for i in range(total_frames):
        ret, frame = video.read()
        pil_img = Image.fromarray(cv2.cvtColor(frame, cv2.COLOR_BGR2RGB))
        if not ret:
            continue
        if i % interval == 0:
            frames.append(pil_img)
    video.release()
    return frames
```
```

     22     for i in range(total_frames):
     23         ret, frame = video.read()
---> 24         pil_img = Image.fromarray(cv2.cvtColor(frame, cv2.COLOR_BGR2RGB))
     25         if not ret:
     26             continue

NameError: name 'Image' is not defined .
```




Fixes # (issue)


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- [ ] Did you write any new necessary tests?


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