github: Update to upload-pages-artifact@v3

...the older version is deprecated.

Author: penberg

.github/workflows/pages.yaml

@@ -26,7 +26,7 @@ jobs:
             - name: "Build"
               run: "npm run typedoc"
             - name: "Upload GitHub Pages artifact"
-              uses: actions/upload-pages-artifact@v1
+              uses: actions/upload-pages-artifact@v3
               with:
                   path: "./packages/libsql-client/docs"