chore(deps-dev): update flake8 requirement from 7.1.0 to 7.1.1 (#661)

Updates the requirements on [flake8](https://github.com/pycqa/flake8) to
permit the latest version.
<details>
<summary>Commits</summary>
<ul>
<li><a
href="https://github.com/PyCQA/flake8/commit/cf1542cefa3e766670b2066dd75c4571d682a649"><code>cf1542c</code></a>
Release 7.1.1</li>
<li><a
href="https://github.com/PyCQA/flake8/commit/939ea3d8d9d5d7d9f348420036af52df74f5ca09"><code>939ea3d</code></a>
Merge pull request <a
href="https://redirect.github.com/pycqa/flake8/issues/1949">#1949</a>
from stephenfin/issue-1948</li>
<li><a
href="https://github.com/PyCQA/flake8/commit/bdcd5c2c0afadaf7c92a4b26d96055cecdd38cf3"><code>bdcd5c2</code></a>
Handle escaped braces in f-strings</li>
<li><a
href="https://github.com/PyCQA/flake8/commit/2a811cc4d2aaed3e8eb5a9f04f08ccc8af7c0791"><code>2a811cc</code></a>
Merge pull request <a
href="https://redirect.github.com/pycqa/flake8/issues/1946">#1946</a>
from Viicos/patch-1</li>
<li><a
href="https://github.com/PyCQA/flake8/commit/10314ad9e5236f1ddf70cb25c2854c93c0840b66"><code>10314ad</code></a>
Fix wording of plugins documentation</li>
<li>See full diff in <a
href="https://github.com/pycqa/flake8/compare/7.1.0...7.1.1">compare
view</a></li>
</ul>
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pyproject.toml

@@ -83,7 +83,7 @@ xml-validation = ["lxml"]
 [tool.poetry.group.dev.dependencies]
 ddt = "1.7.2"
 coverage = "7.6.0"
-flake8 = { version="7.1.0", python=">=3.8.1" }
+flake8 = { version="7.1.1", python=">=3.8.1" }
 flake8-annotations = { version="3.1.1", python=">=3.8.1" }
 flake8-bugbear = { version="24.4.26", python=">=3.8.1" }
 flake8-isort = "6.1.1"