Bump actions/checkout from 2 to 4 (#123)

Signed-off-by: dependabot[bot] <[email protected]>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: dependabot[bot]

.github/workflows/build-docs-dev.yaml

@@ -11,7 +11,7 @@ jobs:
     env:
       SPHINX_GITHUB_CHANGELOG_TOKEN: ${{ secrets.GITHUB_TOKEN }}
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
 
       - uses: actions/setup-python@v4
         with:

.github/workflows/build-docs-version.yaml

@@ -12,7 +12,7 @@ jobs:
     env:
       SPHINX_GITHUB_CHANGELOG_TOKEN: ${{ secrets.GITHUB_TOKEN }}
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
 
       - uses: actions/setup-python@v4
         with:

.github/workflows/build-publish.yml

@@ -19,7 +19,7 @@ jobs:
     runs-on: ubuntu-latest
 
     steps:
-    - uses: actions/checkout@v3
+    - uses: actions/checkout@v4
     - name: Set up Python
       uses: actions/setup-python@v2
       with:

.github/workflows/build-test.yml

@@ -11,7 +11,7 @@ jobs:
       matrix:
         python-version: ['3.8', '3.9', '3.10', '3.11']
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v4
       - run: |
            docker build -f bin/all.Dockerfile \
              --build-arg PYTHON_VERSION=${{ matrix.python-version }} \

.github/workflows/manual-build-docs-version.yaml

@@ -21,10 +21,10 @@ jobs:
     env:
       SPHINX_GITHUB_CHANGELOG_TOKEN: ${{ secrets.GITHUB_TOKEN }}
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
         if: inputs.commit == ''
 
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
         if: inputs.commit != ''
         with:
           ref: ${{ inputs.commit }}

.github/workflows/optional-test-bsuite.yml

@@ -8,7 +8,7 @@ jobs:
   optional-test-bsuite:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v4
 
       # Behavior Suite
       - run: |

.github/workflows/optional-test-dm-control-multiagent.yml

@@ -8,7 +8,7 @@ jobs:
   optional-test-dm-control-multiagent:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v4
 
       # DM Control Multi-Agent
       - run: |

.github/workflows/optional-test-dm-control.yml

@@ -8,7 +8,7 @@ jobs:
   optional-test-dm-control:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v4
 
       # DM Control
       - run: |

.github/workflows/optional-test-dm-lab.yml

@@ -8,7 +8,7 @@ jobs:
   optional-test-dm-lab:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v4
 
       # DM Lab
       - run: |

.github/workflows/optional-test-meltingpot.yml

@@ -8,7 +8,7 @@ jobs:
   optional-test-meltingpot:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v4
 
       # Melting Pot
       - run: |