Bump flask in /utc-time in the pip group across 1 directory (#284)

Bumps the pip group with 1 update in the /utc-time directory: [flask](https://github.com/pallets/flask).


Updates `flask` from 3.0.0 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@3.0.0...3.1.3)

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

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Author: dependabot[bot]

utc-time/requirements.txt

@@ -1 +1 @@
-Flask==3.0.0
+Flask==3.1.3