Update src/Tyr-GPU-Driver.md

Co-authored-by: Miguel Ojeda <ojeda@users.noreply.github.com>

Author: deborahbrouwer

src/Tyr-GPU-Driver.md

@@ -16,7 +16,7 @@ ecosystem. It will probably take a couple of years for Tyr to fully pick up.
 
 ## Where is Tyr developed?
 
-Tyr is developed both upstream and downstream:
+Tyr is developed both upstream and downstream.
 
 ### Upstream
 The initial skeleton of the Tyr driver is now upstream. Submissions against the upstream Tyr driver should go to the [rust-for-linux](https://lore.kernel.org/rust-for-linux/) mailing list. If the submission is larger and/or needs to be pre-reviewed, open a merge request against the [tyr-for-upstream](https://gitlab.freedesktop.org/panfrost/linux/-/tree/tyr-for-upstream) branch in the [panfrost/linux](https://gitlab.freedesktop.org/panfrost/linux) repository.