use newer actions/checkout version

Author: nmdefries

.github/workflows/create_release.yml

@@ -11,7 +11,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Check out code
-        uses: actions/checkout@v2
+        uses: actions/checkout@v3
         with:
           ref: main
           ssh-key: ${{ secrets.CMU_DELPHI_DEPLOY_MACHINE_SSH }}

.github/workflows/release_main.yml

@@ -20,7 +20,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Check out code
-        uses: actions/checkout@v2
+        uses: actions/checkout@v3
       - name: Set up Python 3.8
         uses: actions/setup-python@v2
         with:
@@ -49,7 +49,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Check out code
-        uses: actions/checkout@v2
+        uses: actions/checkout@v3
         with:
           ref: dev
           fetch-depth: 0