Actions fixing (#216)

* Update to checkout@v4

* Update to upload-artifact@v4

Author: hongooi73

.github/workflows/check-standard.yaml

@@ -24,7 +24,7 @@ jobs:
       RSPM: ${{ matrix.config.rspm }}
 
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
         with:
           fetch-depth: 0  # required for mirroring, see https://stackoverflow.com/a/64272409/474349
 
@@ -85,7 +85,7 @@ jobs:
 
       - name: Upload check results
         if: failure()
-        uses: actions/upload-artifact@v3
+        uses: actions/upload-artifact@v4
         with:
           name: ${{ runner.os }}-r${{ matrix.config.r }}-results
           path: check