Bump flask from 3.1.0 to 3.1.1 in /misc/istio/svc1

Bumps [flask](https://github.com/pallets/flask) from 3.1.0 to 3.1.1.
- [Release notes](https://github.com/pallets/flask/releases)
- [Changelog](https://github.com/pallets/flask/blob/main/CHANGES.rst)
- [Commits](pallets/flask@3.1.0...3.1.1)

---
updated-dependencies:
- dependency-name: flask
  dependency-version: 3.1.1
  dependency-type: direct:production
...

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]

misc/istio/svc1/requirements.txt

@@ -3,7 +3,7 @@ certifi==2025.1.31
 charset-normalizer==3.4.1
 click==8.1.8
 Deprecated==1.2.18
-Flask==3.1.0
+Flask==3.1.1
 googleapis-common-protos==1.69.2
 grpcio==1.71.0
 idna==3.10