[CLN] Lint rust in CI (#2192)

## Description of changes

*Summarize the changes made by this PR.*
 - Improvements & Bug fixes
	 - Lint rust in CI
 - New functionality
	 - ...

## Test plan
*How are these changes tested?*
- [x] Tests pass locally with `pytest` for python, `yarn test` for js,
`cargo test` for rust

## Documentation Changes
None

Author: HammadB

.github/workflows/pr.yml

@@ -99,3 +99,6 @@ jobs:
           pre-commit run --all-files flake8
           pre-commit run --all-files prettier
           pre-commit run --all-files check-yaml
+      - name: Cargo fmt check
+        shell: bash
+        run: cargo fmt -- --check