Missin css

### Description

Hello,

these file are missing (bento)
https://cdn.ampproject.org/v1/amp-audio-1.0.css
https://cdn.ampproject.org/v0/amp-audio-0.1.css

they are mentioned here

https://amp.dev/documentation/components/amp-audio-v1.0/?format=websites

Best Regards

### Reproduction Steps

https://cdn.ampproject.org/v1/amp-audio-1.0.css
https://cdn.ampproject.org/v0/amp-audio-0.1.css

### Relevant Logs

_No response_

### Browser(s) Affected

_No response_

### OS(s) Affected

_No response_

### Device(s) Affected

_No response_

### AMP Version Affected

_No response_

Start by checking the two reported CDN URLs and the linked amp-audio documentation reference to determine how the missing CSS files are expected to be produced or published. Trace the amp-audio asset entry point in the repository; done means both documented URLs resolve to the expected files.

Written by the indexing model from the issue text.