chore(deps-dev): Bump ex_doc from 0.30.3 to 0.30.4 in /elixir (#410)

Bumps [ex_doc](https://github.com/elixir-lang/ex_doc) from 0.30.3 to
0.30.4.
<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>v0.30.4 (2023-08-03)</h2>
<ul>
<li>Bug fixes
<ul>
<li>Fix style for anchors in headers</li>
</ul>
</li>
</ul>
</blockquote>
</details>
<details>
<summary>Commits</summary>
<ul>
<li><a
href="a67fed176c"><code>a67fed1</code></a>
Release v0.30.4</li>
<li><a
href="eb6bbda3a2"><code>eb6bbda</code></a>
Bump word-wrap from 1.2.3 to 1.2.4 in /assets (<a
href="https://redirect.github.com/elixir-lang/ex_doc/issues/1742">#1742</a>)</li>
<li><a
href="2b5bbb3eb1"><code>2b5bbb3</code></a>
Update assets</li>
<li><a
href="be43c5a939"><code>be43c5a</code></a>
fix generation of livebook paths to handle omitted '.html' correctly (<a
href="https://redirect.github.com/elixir-lang/ex_doc/issues/1741">#1741</a>)</li>
<li><a
href="6c3afe5472"><code>6c3afe5</code></a>
Update assets</li>
<li>See full diff in <a
href="https://github.com/elixir-lang/ex_doc/compare/v0.30.3...v0.30.4">compare
view</a></li>
</ul>
</details>
<br />


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elixir/mix.lock

@@ -1,6 +1,6 @@
 %{
   "earmark_parser": {:hex, :earmark_parser, "1.4.33", "3c3fd9673bb5dcc9edc28dd90f50c87ce506d1f71b70e3de69aa8154bc695d44", [:mix], [], "hexpm", "2d526833729b59b9fdb85785078697c72ac5e5066350663e5be6a1182da61b8f"},
-  "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"},
+  "ex_doc": {:hex, :ex_doc, "0.30.4", "e8395c8e3c007321abb30a334f9f7c0858d80949af298302daf77553468c0c39", [: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", "9a19f0c50ffaa02435668f5242f2b2a61d46b541ebf326884505dfd3dd7af5e4"},
   "jason": {:hex, :jason, "1.4.0", "e855647bc964a44e2f67df589ccf49105ae039d4179db7f6271dfd3843dc27e6", [:mix], [{:decimal, "~> 1.0 or ~> 2.0", [hex: :decimal, repo: "hexpm", optional: true]}], "hexpm", "79a3791085b2a0f743ca04cec0f7be26443738779d09302e01318f97bdb82121"},
   "json": {:hex, :json, "1.4.1", "8648f04a9439765ad449bc56a3ff7d8b11dd44ff08ffcdefc4329f7c93843dfa", [:mix], [], "hexpm", "9abf218dbe4ea4fcb875e087d5f904ef263d012ee5ed21d46e9dbca63f053d16"},
   "makeup": {:hex, :makeup, "1.1.0", "6b67c8bc2882a6b6a445859952a602afc1a41c2e08379ca057c0f525366fc3ca", [:mix], [{:nimble_parsec, "~> 1.2.2 or ~> 1.3", [hex: :nimble_parsec, repo: "hexpm", optional: false]}], "hexpm", "0a45ed501f4a8897f580eabf99a2e5234ea3e75a4373c8a52824f6e873be57a6"},