The Bodhi client moved from `fedora.client` to `bodhi.client.bindings`,
and the former is removed as of this commit:

fedora-infra/python-fedora@ad1e87c#diff-f260ce8db4a44fd0a5d8a8d4ebf83dfb63eb5ff7c48d0880f7abe3850e3322ea

Switch to importing from `bodhi.client.bindings`.

```
src/fedora/fedora-active-user on  fix-bodhi [!] via 🐍 v3.9.0
✦ ❯ python3 fedora_active_user.py --user salimma --nobz --nofedmsg --nokoji --nolists
FAS username: salimma
FAS password for salimma:

Last login in FAS:
   salimma 2021-01-08

Last package update on bodhi:
   2021-01-02 02:04:10 on package fb303-0-0.1.20201228git7700913.fc33 fbthrift-2020.12.28.00-1.fc33 fbzmq-2020.12.28.00-1.fc33 fizz-2020.12.28.00-1.fc33 folly-2020.12.28.00-1.fc33 wangle-2020.12.28.00-1.fc33 watchman-2020.12.28.00-1.fc33
```

Signed-off-by: Michel Alexandre Salim <michel@michel-slm.name>