Fixes Open-Systems-Pharmacology#1099 linux uses R 4.3.1

Author: pchelle

.github/workflows/LinuxImages.yml

@@ -10,7 +10,7 @@ jobs:
     strategy:
         fail-fast: false
         matrix:
-            r_version: [4.1.0] #[3.6.3, 4.1.0]
+            r_version: [4.3.1] #[3.6.3, 4.1.0]
             os_version: [bionic] #[centos7, bionic]
     runs-on: ubuntu-latest
     steps: