Update conda-package-build.yml

only for macos-13

Author: pradal

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

@@ -13,5 +13,7 @@ on:
 jobs:
   build:
     uses: openalea/github-action-conda-build/.github/workflows/conda-package-build.yml@main
+    with: 
+      os: macos-13
     secrets: 
       anaconda_token: ${{ secrets.ANACONDA_TOKEN }}