chore(deps): bump flask from 3.0.1 to 3.0.3 in /application

Bumps [flask](https://github.com/pallets/flask) from 3.0.1 to 3.0.3.
- [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/3.0.1...3.0.3)

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

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

application/requirements.txt

@@ -9,7 +9,7 @@ EbookLib==0.18
 elasticsearch==8.14.0
 escodegen==1.0.11
 esprima==4.0.1
-Flask==3.0.1
+Flask==3.0.3
 faiss-cpu==1.8.0.post1
 gunicorn==23.0.0
 html2text==2020.1.16