ERROR 404: Not Found. selenium-server-4.0.0-prerelease-beta-3-909239cd9f.jar 

## 🐛 Bug Report

Build of Base docker image (docker-selenium/Base/Dockerfile) fails with error:
```
 ---> Running in 7dd44e6d919a
https://github.com/SeleniumHQ/docker-selenium/raw/beta-jars/selenium-server-4.0.0-prerelease-beta-3-909239cd9f.jar:
2021-03-26 16:43:14 ERROR 404: Not Found.
```

