set CRAN env with CODENAME

Author: LiNk-NY

.github/workflows/basic_checks.yml

@@ -23,9 +23,13 @@ jobs:
     env:
       R_REMOTES_NO_ERRORS_FROM_WARNINGS: TRUE
       GITHUB_PAT: ${{ secrets.GITHUB_TOKEN }}
-      CRAN: https://packagemanager.posit.co/cran/__linux__/jammy/latest
 
     steps:
+      - name: Get Ubuntu Codename and Set CRAN URL
+        run: |
+          CODENAME=$(lsb_release -cs)
+          echo "CRAN=https://packagemanager.posit.co/cran/__linux__/${CODENAME}/latest" >> "$GITHUB_ENV"
+
       - name: Checkout Repository
         uses: actions/checkout@v4