Bump actions/cache from 2 to 3 (#87)

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

Author: dependabot[bot]

.github/workflows/ci-additional.yaml

@@ -56,7 +56,7 @@ jobs:
           echo "CONDA_ENV_FILE=ci/${{ matrix.env }}.yml" >> $GITHUB_ENV
 
       - name: Cache conda
-        uses: actions/cache@v2
+        uses: actions/cache@v3
         with:
           path: ~/conda_pkgs_dir
           key:

.github/workflows/ci.yaml

@@ -31,7 +31,7 @@ jobs:
           echo "CONDA_ENV_FILE=ci/environment.yml" >> $GITHUB_ENV
           echo "PYTHON_VERSION=${{ matrix.python-version }}" >> $GITHUB_ENV
       - name: Cache conda
-        uses: actions/cache@v2
+        uses: actions/cache@v3
         with:
           path: ~/conda_pkgs_dir
           key: