Move off deprecated upload-artifactv3 (#56439)

Looking at https://google.github.io/osv-scanner/github-action/ for v4 action

Author: jtmcdole

.github/workflows/third_party_scan.yml

@@ -31,7 +31,7 @@ jobs:
       - name: "extract deps, find commit hash, pass to osv-scanner"
         run: python ci/scan_deps.py --output osv-lockfile-${{github.sha}}.json
       - name: "upload osv-scanner deps"
-        uses: actions/upload-artifact@604373da6381bf24206979c74d06a550515601b9
+        uses: actions/upload-artifact@v4
         with:
           # use github.ref in name to avoid duplicated artifacts
           name: osv-lockfile-${{github.sha}}