use R 4.5 in GHA

Author: mbstadler

.github/workflows/build-deploy-qmd.yaml

@@ -21,7 +21,7 @@ jobs:
       fail-fast: false
       matrix:
         config:
-          - { os: ubuntu-latest, r: '4.4' }
+          - { os: ubuntu-latest, r: '4.5' }
 
     env:
       R_REMOTES_NO_ERRORS_FROM_WARNINGS: true