chore(deps): bump flask (#3344)

Bumps [flask](https://github.com/pallets/flask) from 1.1.2 to 2.3.2.
- [Release notes](https://github.com/pallets/flask/releases)
- [Changelog](https://github.com/pallets/flask/blob/main/CHANGES.rst)
- [Commits](pallets/flask@1.1.2...2.3.2)

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

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Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

mobilecoind/clients/python/blockchain_explorer/requirements.txt

@@ -1,4 +1,4 @@
-Flask==1.1.2
+Flask==2.3.2
 grpcio==1.37.0
 grpcio-tools==1.37.0
 mobilecoin==0.3.3