Bump pytz from 2023.3.post1 to 2023.4 (#44)

Bumps [pytz](https://github.com/stub42/pytz) from 2023.3.post1 to
2023.4.
<details>
<summary>Commits</summary>
<ul>
<li><a
href="https://github.com/stub42/pytz/commit/ebee1ae4ef35f6fe73603b7582b458a732ae9b8a"><code>ebee1ae</code></a>
Stop building unused distribution files</li>
<li><a
href="https://github.com/stub42/pytz/commit/77d9c8c39c17ff80eb82aff6bfe62d2b26b253bb"><code>77d9c8c</code></a>
Default to Python 3.12</li>
<li><a
href="https://github.com/stub42/pytz/commit/8f15f8061c59cb04050c1d524df9b34294d9d78b"><code>8f15f80</code></a>
PyPI publication from github</li>
<li><a
href="https://github.com/stub42/pytz/commit/ee2e37b6ae386299ad6a01fbcdc44af5f3739e9c"><code>ee2e37b</code></a>
Bump version to 2023.4 (2023d)</li>
<li><a
href="https://github.com/stub42/pytz/commit/4a8ca236bd92e0b66c6d612fc256b71f6f47a109"><code>4a8ca23</code></a>
IANA 2023d</li>
<li><a
href="https://github.com/stub42/pytz/commit/4a37f7cbb98b170d29c7114c832451cb80476675"><code>4a37f7c</code></a>
Squashed 'tz/' changes from ddb8cf09d..2bb5bb955</li>
<li>See full diff in <a
href="https://github.com/stub42/pytz/compare/release_2023.3.post1...release_2023.4">compare
view</a></li>
</ul>
</details>
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</details>

requirements.txt

@@ -3,7 +3,7 @@ dateparser==1.2.0
 dblpy==0.4.0
 discord.py==2.3.2
 motor==3.3.2
-pytz==2023.3.post1
+pytz==2023.4
 regex==2023.12.25
 requests==2.31.0
 Unidecode==1.3.8