Update to actions/{upload,download}-artifact@v4

Author: badeball

.github/workflows/examples-branch.yml

@@ -51,7 +51,7 @@ jobs:
       - name: Pack
         run: npm pack
       - name: Store dirty build
-        uses: actions/upload-artifact@v3
+        uses: actions/upload-artifact@v4
         with:
           name: build
           path: badeball-*
@@ -88,7 +88,7 @@ jobs:
           rm -rf examples/!(${{ matrix.example }})
           rm -rf !(examples)
       - name: Retrieve dirty build
-        uses: actions/download-artifact@v3
+        uses: actions/download-artifact@v4
         with:
           name: build
           path: examples/${{ matrix.example }}