build(deps): update flask requirement from >=3.1.2 to >=3.1.3

Updates the requirements on [flask](https://github.com/pallets/flask) to permit the latest version.
- [Release notes](https://github.com/pallets/flask/releases)
- [Changelog](https://github.com/pallets/flask/blob/main/CHANGES.rst)
- [Commits](pallets/flask@3.1.2...3.1.3)

---
updated-dependencies:
- dependency-name: flask
  dependency-version: 3.1.3
  dependency-type: direct:production
...

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]

requirements.txt

@@ -1,7 +1,7 @@
 rich-argparse>=1.7.2
 pyOpenSSL>=26.1.0
 requests>=2.33.1
-Flask>=3.1.2
+Flask>=3.1.3
 Flask-HTTPAuth>=4.8.1
 Flask-Babel>=4.0.0
 psutil>=7.1.0