Bump flask from 2.0.3 to 2.2.2 in /stix_shifter (#1072)

Bumps [flask](https://github.com/pallets/flask) from 2.0.3 to 2.2.2.
- [Release notes](https://github.com/pallets/flask/releases)
- [Changelog](https://github.com/pallets/flask/blob/main/CHANGES.rst)
- [Commits](pallets/flask@2.0.3...2.2.2)

---
updated-dependencies:
- dependency-name: flask
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <support@github.com>

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>
Co-authored-by: Md Azam <mdazam@ca.ibm.com>

stix_shifter/requirements.txt

@@ -1,7 +1,7 @@
 adal==1.2.7
 antlr4-python3-runtime==4.8
 boto3==1.26.10
-flask==2.0.3
+flask==2.2.2
 pyOpenSSL==22.1.0
 flatten_json==0.1.13
 python-dateutil==2.8.2