Change download location

This resolves a problem where the downloaded file isn't a bzip2 file:

Example error:
```
16:59:40.681462: [pma.0] bzip2: (stdin) is not a bzip2 file.
16:59:40.737215: [pma.0] tar: Child died with signal 13
16:59:40.737993: [pma.0] tar: Exiting with failure status due to previous errors
```