Bump flask from 2.0.3 to 2.3.2 in /examples/research_projects/decision_transformer (#23094)

Bump flask in /examples/research_projects/decision_transformer

Bumps [flask](https://github.com/pallets/flask) from 2.0.3 to 2.3.2.
- [Release notes](https://github.com/pallets/flask/releases)
- [Changelog](https://github.com/pallets/flask/blob/main/CHANGES.rst)
- [Commits](https://github.com/pallets/flask/compare/2.0.3...2.3.2

)

---
updated-dependencies:
- dependency-name: flask
  dependency-type: direct:production
...
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examples/research_projects/decision_transformer/requirements.txt

@@ -57,7 +57,7 @@ fasteners==0.17.3
 filelock==3.6.0
 fire==0.4.0
 flake8==4.0.1
-Flask==2.0.3
+Flask==2.3.2
 Flask-Compress==1.11
 flatbuffers==2.0
 flax==0.4.0