macOS CI: update two actions to @v3

updates actions for node12->16 requirements.

.github/workflows/macos.yml

@@ -14,7 +14,7 @@ jobs:
   build:
     runs-on: macos-11
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v3
       - name: Install dependencies
         run: |
            date -u
@@ -92,7 +92,7 @@ jobs:
             "ARTIFACT_FILE: ${ARTIFACT_FILE}" \
             "PUBLISH_NAME: ${PUBLISH_NAME}"
           exit
-      - uses: actions/upload-artifact@v2
+      - uses: actions/upload-artifact@v3
         with:
           name: ${{env.ARTIFACT_FILE}}
           path: ${{env.ARTIFACT_PATH}}