chore(deps): update actions/upload-pages-artifact action to v4

Author: renovate[bot]

.github/workflows/pages.yml

@@ -35,7 +35,7 @@ jobs:
         run: python -m curl_fuzzer_tools.generate_decoder_html
 
       - name: Upload artifact
-        uses: actions/upload-pages-artifact@v3
+        uses: actions/upload-pages-artifact@7b1f4a764d45c48632c6b24a0339c27f5614fb0b # v4
         with:
           path: docs