update some actions to remove node 20 warnings (#4298)

Author: JoviDeCroock

.github/workflows/benchmarks.yml

@@ -26,12 +26,12 @@ jobs:
     timeout-minutes: 5
     steps:
       - name: Download locally built preact package
-        uses: actions/download-artifact@v3
+        uses: actions/download-artifact@v4
         with:
           name: npm-package
       - run: mv preact.tgz preact-local.tgz
       - name: Upload locally built preact package
-        uses: actions/upload-artifact@v3
+        uses: actions/upload-artifact@v4
         with:
           name: bench-environment
           path: preact-local.tgz

.github/workflows/ci.yml

@@ -56,7 +56,7 @@ jobs:
           npm pack --ignore-scripts
           mv preact-*.tgz preact.tgz
       - name: Upload npm package
-        uses: actions/upload-artifact@v3
+        uses: actions/upload-artifact@v4
         with:
           name: ${{ inputs.artifact_name || 'npm-package' }}
           path: preact.tgz