Update 2018-07-04-thunderbird-style-guide.md

_posts/2018-07-04-thunderbird-style-guide.md

@@ -34,7 +34,7 @@ To be inline with the new Firefox Photon Design system, we worked on a fork spec
 After the Firefox logo was revamped in 2017, a Thunderbird contributor filed a [ticket on Bugzilla](https://bugzilla.mozilla.org/show_bug.cgi?id=1404648) suggesting to follow Firefox' lead and redesign the Thunderbird logo according to the new Photon Design guidelines. Funnily, this coincided with our own experiments on how Thunderbird's logo could be like so we joined the conversation on Bugzilla. We want to thank the great support we got from Ryan Sipes, Thunderbird's Community Manager, who helped facilitate communication with the Thunderbird Community. The new logo will appear in Thunderbird 60.
 
 ## Usability Study
-Thunderbird was the first project we conducted a Usability Study on. This was possible due to Renata joining our team recently and expanding upon the services Ura offers support. Renata conducted user interviews during [Open Source Conference Albania (OSCAL)](https://osc.al) 2018. The tests were done with 5 testers from different backgrounds, asked to accomplish 9 different tasks. [You can read the final Thunderbid Usablity Study here](https://github.com/uracreative/works/raw/master/Thunderbird/Thunderbird%20Usability%20Study.pdf).
+Thunderbird was the first project we conducted a Usability Study on. This was possible due to Renata joining our team recently and expanding upon the services Ura offers support. Renata conducted user interviews during [Open Source Conference Albania (OSCAL)](https://osc.al) 2018. The tests were done with 5 testers from different backgrounds, asked to accomplish 9 different tasks. [You can read the final Thunderbid Usability Study here](https://github.com/uracreative/works/raw/master/Thunderbird/Thunderbird%20Usability%20Study.pdf).
 
 ![Thunderbird Usability Research](/images/projects/thunderbird_1.png)