chore(deps): update actions/checkout action to v3 (#53)

Co-authored-by: Matt Kramer <[email protected]>

Author: anaconda-renovate-bot

.github/workflows/publish.yaml

@@ -11,7 +11,7 @@ jobs:
 
         steps:
         -   name: Check out repository
-            uses: actions/checkout@v2
+            uses: actions/checkout@ac593985615ec2ede58e132d2e21d2b1cbd6127c # v3
         -   name: Set up python 3.9
             uses: actions/setup-python@d27e3f3d7c64b4bbf8e4abfb9b63b83e846e0435 # v4
             with: