Update R-CMD-check.yml

Author: Schuch666

.github/workflows/R-CMD-check.yml

@@ -13,9 +13,16 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        os: [windows-latest, ubuntu-latest, macos-latest]
-        r: [release, devel]
-
+        include:
+        - os: ubuntu-latest
+          r: release
+        - os: ubuntu-latest
+          r: devel
+        - os: windows-latest
+          r: release
+        - os: macos-latest
+          r: release
+      
     env:
       RSPM: https://packagemanager.posit.co/cran/latest