Bump actions/upload-pages-artifact from 2 to 3 (#284)

Bumps [actions/upload-pages-artifact](https://github.com/actions/upload-pages-artifact) from 2 to 3.
<details>
<summary>Release notes</summary>
<p><em>Sourced from <a href="https://github.com/actions/upload-pages-artifact/releases">actions/upload-pages-artifact's releases</a>.</em></p>
<blockquote>
<h2>v3.0.0</h2>
<h1>Changelog</h1>
<ul>
<li>Use <code>v4</code> upload-artifact tag <a href="https://github.com/robherley"><code>@​robherley</code></a> (<a href="https://redirect.github.com/actions/upload-pages-artifact/issues/80">#80</a>)</li>
<li>Upload pages artifact with upload-artifact v4-beta <a href="https://github.com/konradpabjan"><code>@​konradpabjan</code></a> (<a href="https://redirect.github.com/actions/upload-pages-artifact/issues/78">#78</a>)</li>
</ul>
<p>To deploy a GitHub Pages site which has been uploaded with his version of <code>actions/upload-pages-artifact</code>, you must also use <code>actions/deploy-pages@v4</code> or newer.</p>
<p>See details of <a href="https://github.com/actions/upload-pages-artifact/compare/v2.0.0...v3.0.0">all code changes</a> since previous release.</p>
</blockquote>
</details>
<details>
<summary>Commits</summary>
<ul>
<li><a href="https://github.com/actions/upload-pages-artifact/commit/0252fc4ba7626f0298f0cf00902a25c6afc77fa8"><code>0252fc4</code></a> Merge pull request <a href="https://redirect.github.com/actions/upload-pages-artifact/issues/81">#81</a> from actions/artifacts-next</li>
<li><a href="https://github.com/actions/upload-pages-artifact/commit/2a5c1440746537a84f699a04465e7ac8a64879e4"><code>2a5c144</code></a> Use actions/download-artifact@v4 in test</li>
<li><a href="https://github.com/actions/upload-pages-artifact/commit/7e3f6bb53bf41c0cc32c369403f7fcbb8989c9ae"><code>7e3f6bb</code></a> Merge pull request <a href="https://redirect.github.com/actions/upload-pages-artifact/issues/80">#80</a> from robherley/patch-1</li>
<li><a href="https://github.com/actions/upload-pages-artifact/commit/257e666c0505b64d304755738c09e8a1f32ff7e0"><code>257e666</code></a> Use <code>v4</code> upload-artifact tag</li>
<li><a href="https://github.com/actions/upload-pages-artifact/commit/0313a19afa9efdf74b4e31c9554d35f744213f0e"><code>0313a19</code></a> Merge pull request <a href="https://redirect.github.com/actions/upload-pages-artifact/issues/78">#78</a> from konradpabjan/main</li>
<li><a href="https://github.com/actions/upload-pages-artifact/commit/1228e656868935b3c8b085b28ea3b89b5763c64e"><code>1228e65</code></a> Update action.yml</li>
<li><a href="https://github.com/actions/upload-pages-artifact/commit/eb31309b6cdf94f92e47abb173a0cbed9b5056cf"><code>eb31309</code></a> Update artifact names in tests</li>
<li><a href="https://github.com/actions/upload-pages-artifact/commit/241a975ec2c9ecb3effc2875203cce4b9e25078d"><code>241a975</code></a> Correct artifact name during download</li>
<li><a href="https://github.com/actions/upload-pages-artifact/commit/ef95519d72c61a2dd9137c79470bacfc5bdbbaa8"><code>ef95519</code></a> Unique artifact name per job</li>
<li><a href="https://github.com/actions/upload-pages-artifact/commit/ecdd3edff76d306e98d046dfc846e651354ac144"><code>ecdd3ed</code></a> Switch to using download@v4-beta</li>
<li>Additional commits viewable in <a href="https://github.com/actions/upload-pages-artifact/compare/v2...v3">compare view</a></li>
</ul>
</details>
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</details>

.github/workflows/ci.yml

@@ -53,7 +53,7 @@ jobs:
       run: jupyter-book build docs/
     - name: Upload pages artifact
       if: ${{ github.ref == 'refs/heads/main' }}
-      uses: actions/upload-pages-artifact@v2
+      uses: actions/upload-pages-artifact@v3
       with:
         path: docs/_build/html