build(deps): bump tox from 4.6.1 to 4.6.3 in /requirements

Bumps [tox](https://github.com/tox-dev/tox) from 4.6.1 to 4.6.3.
- [Release notes](https://github.com/tox-dev/tox/releases)
- [Changelog](https://github.com/tox-dev/tox/blob/main/docs/changelog.rst)
- [Commits](tox-dev/tox@4.6.1...4.6.3)

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

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

requirements/integration.txt

@@ -46,17 +46,17 @@ pluggy==1.0.0
     # via tox
 pre-commit==3.3.3
     # via -r integration.in
-pyproject-api==1.5.1
+pyproject-api==1.5.2
     # via tox
 pyproject-hooks==1.0.0
     # via build
 pyyaml==5.4.1
     # via pre-commit
 toposort==1.10
     # via pip-compile-multi
-tox==4.6.1
+tox==4.6.3
     # via -r integration.in
-virtualenv==20.23.0
+virtualenv==20.23.1
     # via
     #   pre-commit
     #   tox