Update dependency flask to v3.1.1

This MR contains the following updates:

Package	Type	Update	Change
flask (changelog)	dependencies	patch	3.1.0 -> 3.1.1

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Release Notes

pallets/flask (flask)

v3.1.1

Compare Source

Released 2025-05-13

• Fix signing key selection order when key rotation is enabled via SECRET_KEY_FALLBACKS. :ghsa:4grg-w6v8-c28g
• Fix type hint for cli_runner.invoke. :issue:5645
• flask --help loads the app and plugins first to make sure all commands are shown. :issue:5673
• Mark sans-io base class as being able to handle views that return AsyncIterable. This is not accurate for Flask, but makes typing easier for Quart. 5659

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poetry.lock

@@ -359,22 +359,23 @@ test = ["pytest (>=6)"]
 
 [[package]]
 name = "flask"
-version = "3.1.0"
+version = "3.1.1"
 description = "A simple framework for building complex web applications."
 optional = false
 python-versions = ">=3.9"
 files = [
-    {file = "flask-3.1.0-py3-none-any.whl", hash = "sha256:d667207822eb83f1c4b50949b1623c8fc8d51f2341d65f72e1a1815397551136"},
-    {file = "flask-3.1.0.tar.gz", hash = "sha256:5f873c5184c897c8d9d1b05df1e3d01b14910ce69607a117bd3277098a5836ac"},
+    {file = "flask-3.1.1-py3-none-any.whl", hash = "sha256:07aae2bb5eaf77993ef57e357491839f5fd9f4dc281593a81a9e4d79a24f295c"},
+    {file = "flask-3.1.1.tar.gz", hash = "sha256:284c7b8f2f58cb737f0cf1c30fd7eaf0ccfcde196099d24ecede3fc2005aa59e"},
 ]
 
 [package.dependencies]
-blinker = ">=1.9"
+blinker = ">=1.9.0"
 click = ">=8.1.3"
-importlib-metadata = {version = ">=3.6", markers = "python_version < \"3.10\""}
-itsdangerous = ">=2.2"
-Jinja2 = ">=3.1.2"
-Werkzeug = ">=3.1"
+importlib-metadata = {version = ">=3.6.0", markers = "python_version < \"3.10\""}
+itsdangerous = ">=2.2.0"
+jinja2 = ">=3.1.2"
+markupsafe = ">=2.1.1"
+werkzeug = ">=3.1.0"
 
 [package.extras]
 async = ["asgiref (>=3.2)"]
@@ -1245,4 +1246,4 @@ testing = ["coverage[toml]", "zope.event", "zope.testing"]
 [metadata]
 lock-version = "2.0"
 python-versions = "^3.9"
-content-hash = "e59743bfbf69915afa987a69b5c9e7a12f30ab797a081146ea62492e6b6a6a63"
+content-hash = "5eb0717bbaabe15a961457093b37c03f33f924900dd743866447959515244e03"