Replace broken url
This replaces the Berkeley url with a mirror link that works, in case a user copies it into their terminal.
@@ -212,7 +212,7 @@ are described here:
.. option:: --base, -b <base url>
- Specify mirror site base url such as -b ``https://mirrors.ocf.berkeley.edu/qt/``
+ Specify mirror site base url such as -b ``https://mirrors.dotsrc.org/qtproject``
where 'online' folder exist.
.. option:: --timeout <timeout(sec)>
