Update packages in build-check-install workflow + run staged.dependencies conditionally

.github/workflows/build-check-install.yaml

@@ -174,6 +174,18 @@ on:
         required: false
         type: string
         default: ""
+      enable-sd:
+        description: |
+          Whether the installation of package dependencies via staged.dependencies should be enabled.
+        required: false
+        type: boolean
+        default: true
+      update-r-packages:
+        description: |
+          Whether R packages installed in the image should be updated to their latest version from CRAN/BioC.
+        required: false
+        type: boolean
+        default: false
 
 concurrency:
   group: r-cmd-${{ inputs.concurrency-group }}-${{ github.event.pull_request.number || github.ref }}
@@ -338,8 +350,17 @@ jobs:
           key: sd-${{ runner.os }}-${{ github.event.repository.name }}
           path: ~/.staged.dependencies
 
+      - name: Update R packages 🗓️
+        if: >-
+          inputs.update-r-packages == true
+        run: |
+          update.packages()
+        shell: Rscript {0}
+
       - name: Run Staged dependencies 🎦
-        if: inputs.install-deps-from-package-repositories == ''
+        if: >-
+          inputs.enable-sd == true
+            && inputs.install-deps-from-package-repositories == ''
         uses: insightsengineering/staged-dependencies-action@v1
         env:
           GITHUB_PAT: ${{ steps.github-token.outputs.token }}