Update pixi_dev_notes.md

Co-authored-by: Copilot <175728472+Copilot@users.noreply.github.com>

Author: julesghub

pixi_dev_notes.md

@@ -7,4 +7,4 @@ Pixi is a new package manager for building Underworld2. It uses `conda-forge` an
 `pixi install` to install an environment of uw2
 `pixi run build` to build uw2 in the environment
 `pixi run test` to run the uw2 tests in the pixi environment
-`pixi shell` (in the same directory as pixi.toml` to enter into the environment.
+`pixi shell` (in the same directory as `pixi.toml`) to enter into the environment.