Upgrade micromamba setup

Author: IsabelParedes

.github/workflows/docs.yml

@@ -14,10 +14,11 @@ jobs:
         uses: actions/checkout@v2
 
       - name: Install docs dependencies
-        uses: mamba-org/provision-with-micromamba@main
+        uses: mamba-org/setup-micromamba@v1
         with:
           environment-file: docs/env.yaml
           environment-name: ipynao_docs
+          cache-environment: true
           micromamba-version: '1.4.1'
 
       - name: Activate environment and install package