Update a few punctuations in CONTRIBUTING.md (#1016)

Update CONTRIBUTING.md

Author: ifunanyaScript

CONTRIBUTING.md

@@ -28,18 +28,18 @@ If you're new we encourage you to take a look at issues tagged with [good first
    by installing [sphinx-serve](https://pypi.org/project/sphinx-serve/) and
    then running `sphinx-serve -b build`.
 
-5. Ensure your test passes locally
+5. Ensure your test passes locally.
 6. If you haven't already, complete the Contributor License Agreement ("CLA").
-7. Address any feedback in code review promptly
+7. Address any feedback in code review promptly.
 
 ## For bug fixes
 1. Fork the repo and create your branch from `main`.
 2. Make sure you have a GPU-enabled machine, either locally or in the cloud. `g4dn.4xlarge` is a good starting point on AWS. 
 3. Make your code change. 
-4. First, install all dependencies with `./run_python_examples.sh "install_deps"` 
+4. First, install all dependencies with `./run_python_examples.sh "install_deps"`.
 5. Then make sure that `./run_python_examples.sh` passes locally by running script end to end. 
 6. If you haven't already, complete the Contributor License Agreement ("CLA").
-7. Address any feedback in code review promptly
+7. Address any feedback in code review promptly.
 
 
 ## Contributor License Agreement ("CLA")