again setup python instead of default for runner

.github/workflows/R_CDM_check_hades.yaml

@@ -54,6 +54,10 @@ jobs:
       - uses: r-lib/actions/setup-tinytex@v2
 
       - uses: r-lib/actions/setup-pandoc@v2
+
+      - uses: actions/setup-python@v5
+        with:
+          python-version=`3.11`
 
       - name: Install system requirements
         if: runner.os == 'Linux'
@@ -79,15 +83,7 @@ jobs:
           
           library(reticulate)
           virtualenv_create("r-reticulate", Sys.which("python"), packages=python_packages)
-          # Detect the OS and set pip options accordingly
-          if (Sys.info()["sysname"] == "Darwin") {
-            # macOS
-            pip_options <- NULL
-          } else {
-            # Other OS, assume Linux or Windows needing CPU torch
-            pip_options <- c("--index-url https://download.pytorch.org/whl/cpu")
-          }
-          virtualenv_install("r-reticulate", "torch", pip_options = pip_options)
+          virtualenv_install("r-reticulate", "torch", pip_options = c("--index-url https://download.pytorch.org/whl/cpu"))
           
           path_to_python <- virtualenv_python("r-reticulate")
           writeLines(sprintf("RETICULATE_PYTHON=%s", path_to_python),