chore(deps): bump flask from 3.1.2 to 3.1.3 in /src/loadgenerator (#3262)

Bumps [flask](https://github.com/pallets/flask) from 3.1.2 to 3.1.3.
- [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: indirect
...

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Author: dependabot[bot]

src/loadgenerator/requirements.txt

@@ -18,7 +18,7 @@ configargparse==1.7.1
     # via locust
 faker==40.1.0
     # via -r requirements.in
-flask==3.1.2
+flask==3.1.3
     # via
     #   flask-cors
     #   flask-login