Bump bandit from 1.7.2 to 1.7.3

Bumps [bandit](https://github.com/PyCQA/bandit) from 1.7.2 to 1.7.3.
- [Release notes](https://github.com/PyCQA/bandit/releases)
- [Commits](PyCQA/bandit@1.7.2...1.7.3)

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

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

Author: dependabot[bot]

requirements.txt

@@ -1,6 +1,6 @@
 Django>=2.2
 Wagtail>=2.8
-bandit==1.7.2
+bandit==1.7.3
 black==22.1.0
 flake8==4.0.1
 isort==5.10.1