Add closing tics to bash environment in README.md

Author: elray1

README.md

@@ -133,6 +133,7 @@ To add or remove a project dependency:
     # alternately, you can use uv to install the dependencies: it is faster and has a
     # a handy sync option that will cleanup unused dependencies
     uv pip sync requirements/requirements-dev.txt
+    ```
 
 ## Opinionated notes on Python tooling