Bump ex_doc from 0.30.1 to 0.30.3 (#44)

Bumps [ex_doc](https://github.com/elixir-lang/ex_doc) from 0.30.1 to
0.30.3.
<details>
<summary>Changelog</summary>
<p><em>Sourced from <a
href="https://github.com/elixir-lang/ex_doc/blob/main/CHANGELOG.md">ex_doc's
changelog</a>.</em></p>
<blockquote>
<h2>v0.30.3 (2023-07-15)</h2>
<ul>
<li>
<p>Enhancements</p>
<ul>
<li>Compress search index before storing in local storage</li>
</ul>
</li>
<li>
<p>Bug fixes</p>
<ul>
<li>Fix styling for headers on cheatsheets and small screens</li>
</ul>
</li>
</ul>
<h2>v0.30.2 (2023-07-11)</h2>
<ul>
<li>Bug fixes
<ul>
<li>Fix escaping in <code>search_data.json</code></li>
<li>Skip vega-lite code blocks in <code>search_data.json</code></li>
</ul>
</li>
</ul>
</blockquote>
</details>
<details>
<summary>Commits</summary>
<ul>
<li>See full diff in <a
href="https://github.com/elixir-lang/ex_doc/commits">compare
view</a></li>
</ul>
</details>
<br />


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Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>
Co-authored-by: Thiago Santos <thia.mdossantos@gmail.com>

mix.lock

@@ -4,7 +4,7 @@
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-  "ex_doc": {:hex, :ex_doc, "0.30.1", "a0f3b598d3c2cb3af48af39e59fa66ac8d4033740409b11dd753a3f30f8f8f7a", [:mix], [{:earmark_parser, "~> 1.4.31", [hex: :earmark_parser, repo: "hexpm", optional: false]}, {:makeup_elixir, "~> 0.14", [hex: :makeup_elixir, repo: "hexpm", optional: false]}, {:makeup_erlang, "~> 0.1", [hex: :makeup_erlang, repo: "hexpm", optional: false]}], "hexpm", "2e2216e84aa33e5803f8898d762b0f5e76bf2de3a08d1f40ac5f74456dd5057c"},
+  "ex_doc": {:hex, :ex_doc, "0.30.3", "bfca4d340e3b95f2eb26e72e4890da83e2b3a5c5b0e52607333bf5017284b063", [:mix], [{:earmark_parser, "~> 1.4.31", [hex: :earmark_parser, repo: "hexpm", optional: false]}, {:makeup_elixir, "~> 0.14", [hex: :makeup_elixir, repo: "hexpm", optional: false]}, {:makeup_erlang, "~> 0.1", [hex: :makeup_erlang, repo: "hexpm", optional: false]}], "hexpm", "fbc8702046c1d25edf79de376297e608ac78cdc3a29f075484773ad1718918b6"},
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