Embed image with alt text contain 'banner' will cause full width size display

[aooaa]

issue: Embed image with alt text contain 'banner' will cause full width size display, and can't adjust size by add "| 100" parameter. this issue can be fix by change to default theme. this issue happen both on IOS system.

e.g. rendered by OB

origin source:

![parallel_web_300x64 ](https://s3.bmp.ovh/imgs/2022/08/30/512204903484eacd.png)

![parallel_web_banner_300x64 ](https://s3.bmp.ovh/imgs/2022/08/30/512204903484eacd.png)

rendered by github

the second embed link text contain a "banner" word, then it cause a full width display.