bumping upload-artifact to v4 to try to fix builds

Author: skyebend

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

@@ -169,7 +169,7 @@ jobs:
 
       - name: Upload build results
         if: contains(matrix.config.flags, 'binaries') && !failure()
-        uses: actions/upload-artifact@v3
+        uses: actions/upload-artifact@v4
         with:
           name: ${{ runner.os }}-r${{ matrix.config.r }}-binaries
           path: binaries
@@ -243,7 +243,7 @@ jobs:
 
       - name: Upload check results
         if: contains(matrix.config.flags, 'covr') == false && failure()
-        uses: actions/upload-artifact@v3
+        uses: actions/upload-artifact@v4
         with:
           name: ${{ runner.os }}-r${{ matrix.config.r }}-results
           path: |