Update conda-package-build.yml

Fix error

Author: pradal

.github/workflows/conda-package-build.yml

@@ -51,7 +51,7 @@ jobs:
     - name: Build and Publish
       uses: openalea/[email protected]
       with:
-        conda: mamba
+        conda: conda
         mamba: true
         numpy: '21.6'
         python: ${{ matrix.python-minor-version }}