Bump flask from 2.1.2 to 2.2.5

Bumps [flask](https://github.com/pallets/flask) from 2.1.2 to 2.2.5.
- [Release notes](https://github.com/pallets/flask/releases)
- [Changelog](https://github.com/pallets/flask/blob/main/CHANGES.rst)
- [Commits](pallets/flask@2.1.2...2.2.5)

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

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

Author: dependabot[bot]

requirements.txt

@@ -4,7 +4,7 @@ charset-normalizer==2.0.12
 click==8.1.3
 ecs-logging==2.0.0
 elastic-apm==6.9.1
-Flask==2.1.2
+Flask==2.2.5
 gunicorn==20.1.0
 idna==3.3
 itsdangerous==2.1.2