Fixed links for web/repo doc

[evoggy]

Got this error when building the website, the URLs were wrong:

 ./_site/documentation/repository/aideck-gap8-examples/master/getting-started/cpx/index.html
Ran on 422 files!
  *  internally linking to /documentation/repository/aideck-gap8-examples/master/documentation/repository/crazyflie-firmware/master/functional-areas/cpx/, which does not exist (line 1215)

     <a href="/documentation/repository/aideck-gap8-examples/master/documentation/repository/crazyflie-firmware/master/functional-areas/cpx/">CPX documentation</a>

- ./_site/documentation/repository/aideck-gap8-examples/master/index.html
  *  internally linking to /documentation/repository/aideck-gap8-examples/master/documentation/tutorials/getting-started-with-aideck/, which does not exist (line 1212)
     <a href="/documentation/repository/aideck-gap8-examples/master/documentation/tutorials/getting-started-with-aideck/">Getting started with the AI deck tutorial</a>
- ./_site/documentation/repository/aideck-gap8-examples/master/test-functions/wifi-streamer/index.html
  *  internally linking to /documentation/repository/aideck-gap8-examples/master/documentation/tutorials/getting-started-with-aideck/, which does not exist (line 1219)
     <a href="/documentation/repository/aideck-gap8-examples/master/documentation/tutorials/getting-started-with-aideck/">Getting started with the AI deck tutorial</a>

HTML-Proofer found 3 failures!

This should be fixed now.