Disable micromamba download in workflow

Author: HrisShterev

.github/workflows/check-notebooks.yml

@@ -98,7 +98,7 @@ jobs:
         uses: mamba-org/setup-micromamba@v2
         with:
           environment-file: environment.yml
-          cache-environment: true
+          download-micromamba: false
 
       - name: Install CUDA kernel
         run: |