Bump flask from 2.2.2 to 2.2.5 in /docs/examples/flask_e2e (#243)

Bumps [flask](https://github.com/pallets/flask) from 2.2.2 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@2.2.2...2.2.5)

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

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Author: dependabot[bot]

docs/examples/flask_e2e/requirements.txt

@@ -3,7 +3,7 @@ certifi==2022.12.7
 charset-normalizer==2.1.1
 click==8.1.3
 Deprecated==1.2.13
-Flask==2.2.2
+Flask==2.2.5
 google-api-core==2.10.2
 google-auth==2.14.1
 google-cloud-monitoring==2.11.3