Engine stats - bing images

Engine name	Scores	Result count	Response time	Reliability
bing images				0

Errors and exceptions

Exception	KeyError	Percentage	100
Filename	searx/engines/bing_images.py:116
Function	response
Code	'content': metadata['desc'],

**Version of SearXNG, commit number if you are using on master branch and stipulate if you forked SearXNG**
Repository: https://github.com/searxng/searxng
Branch: master
Version: 2023.9.23+827af00d9+dirty

**How did you install SearXNG?**

**What happened?**

**How To Reproduce**

**Expected behavior**

**Screenshots & Logs**

**Additional context**

**Technical report**

Error
  * Error: KeyError
  * Percentage: 100
  * Parameters: `()`
  * File name: `searx/engines/bing_images.py:116`
  * Function: `response`
  * Code: `'content': metadata['desc'],`

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