[Bug]: Error on installing dependencies

### Description?

```
[hrq@fedora ~]$ pip install -r https://github.com/brpaz/ulauncher-github/blob/master/requirements.txt
Defaulting to user installation because normal site-packages is not writeable
WARNING: Cache entry deserialization failed, entry ignored
ERROR: Invalid requirement: '<!DOCTYPE html>' (from line 8 of https://github.com/brpaz/ul
```

### Extension Logs

```shell
None
```
