ci: more GHA versions

.github/workflows/continuous-integration.yml

@@ -13,11 +13,11 @@ jobs:
     env:
       DOCKER_BUILDKIT: true
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v4
       - name: Execute linters and test suites
         run: ./docker/cibuild
       - name: Upload All coverage to Codecov
-        uses: codecov/codecov-action@v1
+        uses: codecov/codecov-action@v4
         with:
           token: ${{ secrets.CODECOV_TOKEN }}
           file: ./coverage.xml
@@ -32,15 +32,15 @@ jobs:
       run:
         shell: bash -l {0}
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v4
       - name: Set up conda cache
-        uses: actions/cache@v2
+        uses: actions/cache@v4
         with:
           path: ~/conda_pkgs_dir
           key: ${{ runner.os }}-conda-${{ hashFiles('**/environment.yml') }}
           restore-keys: ${{ runner.os }}-conda-
       - name: Set up pip cache
-        uses: actions/cache@v2
+        uses: actions/cache@v4
         with:
           path: ~/.cache/pip
           key: ${{ runner.os }}-pip-${{ hashFiles('pyproject.toml') }}