macosCI: use actions/setup-python to use [email protected]

Author: nicolaslg

.github/workflows/continuous-macos.yml

@@ -21,6 +21,9 @@ jobs:
     - uses: actions/checkout@v4
       with:
         submodules: recursive
+    - uses: actions/setup-python@v5
+      with:
+        python-version: '3.12'
 
     - name: Initialize the dev environement
       run : ./.github/workflows/env_macos.sh

.github/workflows/env_macos.sh

@@ -1,6 +1,5 @@
 #!/bin/bash
 
-
 git clone --depth=1 -b v0.22.2 https://github.com/spack/spack.git
 
 #replace the default configuration file of spack by a simpler one without hash, compiler versions, tags and so on