update actions/checkout to v4

.github/workflows/check-bioc.yaml

@@ -76,7 +76,7 @@ jobs:
       ## https://github.com/r-lib/actions/blob/master/examples/check-standard.yaml
       ## If they update their steps, we will also need to update ours.
       - name: Checkout Repository
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
 
       ## R is already included in the Bioconductor docker images
       - name: Setup R from r-lib