try caching conda env instead

Author: zm711

.github/workflows/io-test.yml

@@ -48,7 +48,7 @@ jobs:
 
       - uses: conda-incubator/setup-miniconda@v3
         with:
-          activate-environment: neo-test-env
+          activate-environment: neo-test-env-${{ matrix.python-version }}
           python-version: "${{ matrix.python-version }}"
 
       - name: Get current dependencies hash
@@ -62,17 +62,13 @@ jobs:
         #   * when package dependencies change
         id: cache-conda-env
         with:
-          path: /usr/share/miniconda/envs/neo-test-env
+          path: /usr/share/miniconda/envs/neo-test-env-${{ matrix.python-version }}
           key: ${{ runner.os }}-conda-env-${{ steps.dependencies.outputs.hash }}-${{ steps.date.outputs.date }}
           # restore-keys match any key that starts with the restore-key
           restore-keys: |
             ${{ runner.os }}-conda-env-${{ steps.dependencies.outputs.hash }}-
             ${{ runner.os }}-conda-env-
 
-      - name: Install Python Version
-        run: |
-          conda install --force-reinstall python=${{ matrix.python-version }} pip pytest
-
       - name: Install testing dependencies
         # testing environment is only created from yml if no cache was found
         # restore-key hits should result in `cache-hit` == 'false'