Update setup-micromamba

Author: maxrjones

.github/workflows/main.yaml

@@ -48,7 +48,7 @@ jobs:
         uses: mamba-org/setup-micromamba@v1
         with:
           # environment-file is not assumed anymore
-          environment-file: ci/environment.yml
+          environment-file: ci/environment.yaml
           create-args: >-
             python=${{ matrix.python-version }}
       - name: Install package