Bump mypy from 1.5.0 to 1.5.1 (#152)

Bumps [mypy](https://github.com/python/mypy) from 1.5.0 to 1.5.1.
<details>
<summary>Commits</summary>
<ul>
<li><a
href="https://github.com/python/mypy/commit/de4f2ad99c88b885677247534dcec335621ade4d"><code>de4f2ad</code></a>
[Release 1.5] Bump version to 1.5.1 to pick up last 2 CPs</li>
<li><a
href="https://github.com/python/mypy/commit/2ff7c0de571d434a9a1f82fa183d32fa32999b40"><code>2ff7c0d</code></a>
[release 1.5] stubtest: Fix <code>__mypy-replace</code> false positives
(<a
href="https://redirect.github.com/python/mypy/issues/15689">#15689</a>)
(<a
href="https://redirect.github.com/python/mypy/issues/15751">#15751</a>)</li>
<li><a
href="https://github.com/python/mypy/commit/373b73abeb14fdd1f3021f4c27fe1721d2986ed4"><code>373b73a</code></a>
[Release 1.5] Update typing_extensions stubs (<a
href="https://redirect.github.com/python/mypy/issues/15745">#15745</a>)</li>
<li>See full diff in <a
href="https://github.com/python/mypy/compare/v1.5.0...v1.5.1">compare
view</a></li>
</ul>
</details>
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pyproject.toml

@@ -52,7 +52,7 @@ dev-mkdocs = [
   "frequenz-repo-config[lib] == 0.4.0",
 ]
 dev-mypy = [
-  "mypy == 1.5.0",
+  "mypy == 1.5.1",
   # For checking the noxfile, docs/ script, and tests
   "frequenz-channels[dev-mkdocs,dev-noxfile,dev-pytest]",
 ]