Upgrade ci checkout version. (#2136)

* Bump checkout@v2 to v4

* Roll back to v3.

Author: Gamenot

.github/workflows/ci-auto-commit-linux.yml

@@ -24,7 +24,7 @@ jobs:
       - name: Add safe directory
         run: git config --global --add safe.directory $GITHUB_WORKSPACE
       - name: Checkout
-        uses: actions/checkout@v2
+        uses: actions/checkout@v3
         with:
           ref: master
       - name: Install SMARTS

.github/workflows/ci-auto-commit-mac.yml

@@ -14,7 +14,7 @@ jobs:
     runs-on: macos-11
     steps:
       - name: Checkout
-        uses: actions/checkout@v2
+        uses: actions/checkout@v3
         with:
           ref: master
       - name: Set up Python

.github/workflows/ci-base-tests-linux.yml

@@ -23,7 +23,7 @@ jobs:
           - ./examples/tests/test_examples.py
     steps:
       - name: Checkout
-        uses: actions/checkout@v2
+        uses: actions/checkout@v3
       - name: Install dependencies
         run: |
           python3.8 -m venv ${{env.venv_dir}}
@@ -76,7 +76,7 @@ jobs:
           - e11_platoon
     steps:
       - name: Checkout
-        uses: actions/checkout@v2
+        uses: actions/checkout@v3
       - name: Install dependencies
         run: |
           cd ${GITHUB_WORKSPACE}/examples/${{matrix.tests}}
@@ -108,7 +108,7 @@ jobs:
           - e11_platoon
     steps:
       - name: Checkout
-        uses: actions/checkout@v2
+        uses: actions/checkout@v3
       - name: Install dependencies
         run: |
           cd ${GITHUB_WORKSPACE}

.github/workflows/ci-base-tests-mac.yml

@@ -26,7 +26,7 @@ jobs:
           - ./smarts/ray
     steps:
       - name: Checkout
-        uses: actions/checkout@v2
+        uses: actions/checkout@v3
         with:
           ref: master
       - name: Setup Python

.github/workflows/ci-format.yml

@@ -12,7 +12,7 @@ jobs:
     container: ghcr.io/smarts-project/smarts:v0.6.1-minimal
     steps:
       - name: Checkout
-        uses: actions/checkout@v2
+        uses: actions/checkout@v3
       - name: Check header
         run: |
           cd $GITHUB_WORKSPACE
@@ -24,7 +24,7 @@ jobs:
     container: ghcr.io/smarts-project/smarts:v0.6.1-minimal
     steps:
       - name: Checkout
-        uses: actions/checkout@v2
+        uses: actions/checkout@v3
       - name: Check docstring
         run: |
           cd $GITHUB_WORKSPACE
@@ -51,7 +51,7 @@ jobs:
       - name: Add safe directory
         run: git config --global --add safe.directory $GITHUB_WORKSPACE
       - name: Checkout
-        uses: actions/checkout@v2
+        uses: actions/checkout@v3
         with:
           fetch-depth: 0
       - name: Install SMARTS
@@ -85,7 +85,7 @@ jobs:
       - name: Add safe directory
         run: git config --global --add safe.directory $GITHUB_WORKSPACE
       - name: Checkout
-        uses: actions/checkout@v2
+        uses: actions/checkout@v3
         with:
           fetch-depth: 0
       - name: Install Enchant
@@ -123,7 +123,7 @@ jobs:
       - name: Add safe directory
         run: git config --global --add safe.directory $GITHUB_WORKSPACE
       - name: Checkout
-        uses: actions/checkout@v2
+        uses: actions/checkout@v3
         with:
           fetch-depth: 0
       - name: Install SMARTS with all extras and check for conflicts

.github/workflows/ci-pull-request.yml

@@ -14,7 +14,7 @@ jobs:
     container: ghcr.io/smarts-project/smarts:v0.6.1-minimal
     steps:
       - name: Checkout
-        uses: actions/checkout@v2
+        uses: actions/checkout@v3
       - name: Setup package
         run: |
           cd $GITHUB_WORKSPACE

.github/workflows/ci-python-version-test.yml

@@ -15,7 +15,7 @@ jobs:
       matrix:
         python-version: ['3.8', '3.9', '3.10', '3.11']
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v3
       - name: Set up Python ${{ matrix.python-version }}
         uses: actions/setup-python@v4
         with:

.github/workflows/ci-test-learning.yml

@@ -17,7 +17,7 @@ jobs:
     container: ghcr.io/smarts-project/smarts:v0.6.1-minimal
     steps:
       - name: Checkout
-        uses: actions/checkout@v2
+        uses: actions/checkout@v3
         with:
           ref: master
       - name: Setup package

.github/workflows/ci-test-long-determinism.yml

@@ -17,7 +17,7 @@ jobs:
     container: ghcr.io/smarts-project/smarts:v0.6.1-minimal
     steps:
       - name: Checkout
-        uses: actions/checkout@v2
+        uses: actions/checkout@v3
         with:
           ref: master
       - name: Setup package

.github/workflows/ci-test-memory-growth.yml

@@ -17,7 +17,7 @@ jobs:
     container: ghcr.io/smarts-project/smarts:v0.6.1-minimal
     steps:
       - name: Checkout
-        uses: actions/checkout@v2
+        uses: actions/checkout@v3
         with:
           ref: master
       - name: Setup package