CI: enable environment cache

.github/workflows/ci.yaml

@@ -63,13 +63,9 @@ jobs:
         environment-file: envs/environment.yaml
         log-level: debug
         init-shell: bash
-        cache-environment: false
+        cache-environment: true
         cache-downloads: true
 
-    - name: Print installed dependencies
-      run: |
-        micromamba list
-
     - name: Set cache dates
       run: |
         echo "WEEK=$(date +'%Y%U')" >> $GITHUB_ENV