All regions have not been working for some time. - Cognitive Services REST APIs: https://westus.dev.cognitive.microsoft.com/docs/services/

All regions links to https://westus.dev.cognitive.microsoft.com/docs/services/ are giving 503 errors and have been for weeks.

### This issue is for a: (mark with an `x`)
```
- [ ] bug report -> please search issues before submitting
- [ ] feature request
- [X] documentation issue or request
- [ ] regression (a behavior that used to work and stopped in a new release)
```

### Minimal steps to reproduce
> Visit the site https://westus.dev.cognitive.microsoft.com/docs/services/ and get a 503

### Expected/desired behavior
> The sites globally need to be restored. (e.g. also the uksouth version)