deps(py): update pytz requirement from <2026.0,>=2025.2 to >=2025.2,<2027.0 in the production-dependencies group (#1507)

Updates the requirements on [pytz](https://github.com/stub42/pytz) to
permit the latest version.
Updates `pytz` to 2026.1.post1
<details>
<summary>Commits</summary>
<ul>
<li><a
href="https://github.com/stub42/pytz/commit/02509d04e32b438351ada260bb0cc6d24d461ae9"><code>02509d0</code></a>
Update test runners for new Pythons and github actions</li>
<li><a
href="https://github.com/stub42/pytz/commit/43c1cb28d7a243392f767d2459677e2775fc884b"><code>43c1cb2</code></a>
Bump version number to 2026.1.post1</li>
<li><a
href="https://github.com/stub42/pytz/commit/6ee7e564acbd729972951880f2fbf9b93f95aacb"><code>6ee7e56</code></a>
Try to access resource using <code>importlib.resources</code></li>
<li><a
href="https://github.com/stub42/pytz/commit/95fe75d8f15cfc3d5b70e1e71258ddebf0776436"><code>95fe75d</code></a>
Bump version number to 2026.1 (2026a)</li>
<li><a
href="https://github.com/stub42/pytz/commit/70342757a549e712136cc21f21b3a9441cec5f90"><code>7034275</code></a>
Updates for upstream directory layout changes</li>
<li><a
href="https://github.com/stub42/pytz/commit/4dd79d36d8fa4ab04ebcc3d3636406e31d4aed75"><code>4dd79d3</code></a>
IANA 2026a</li>
<li><a
href="https://github.com/stub42/pytz/commit/08d7e76ec477b3adfc5983c64102803cf9ed47d8"><code>08d7e76</code></a>
Squashed 'tz/' changes from 7e1145bfdb..e23c045f8f</li>
<li><a
href="https://github.com/stub42/pytz/commit/b07d947809771430cdecde253e7f8eb549686b07"><code>b07d947</code></a>
try to access resource using <code>importlib.resources</code></li>
<li>See full diff in <a
href="https://github.com/stub42/pytz/compare/release_2025.2...release_2026.1.post1">compare
view</a></li>
</ul>
</details>
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pyproject.toml

@@ -40,7 +40,7 @@ dependencies = [
     "pyjwt >= 2.11.0, < 3.0.0",
     "python-glowplug >= 0.3.12, < 1.0.0",
     "python3-saml >= 1.16.0, < 2.0.0",
-    "pytz >= 2025.2, < 2026.0",
+    "pytz >= 2025.2, < 2027.0",
     "requests >= 2.32.5, < 3.0.0",
     "sentry-sdk >= 2.52.0, < 3.0.0",
     "sqlalchemy [asyncio] >= 2.0.46, < 3.0.0",