refactor : chgt de r_script dans settings

settings.json

 {
-  "analysis_name": "Identifi",
-  "r_script": "identifiabilite.R",
+  "analysis_name": "Identifialpha",
+  "r_script": "identif_alpha.R",
   "py_env": "base",
   "reticulate_env": "",
   "logfile": "install.log",