build(deps): bump pip-compile-multi from 2.6.1 to 2.6.2 in /requirements

Bumps [pip-compile-multi](https://github.com/peterdemin/pip-compile-multi) from 2.6.1 to 2.6.2.
- [Release notes](https://github.com/peterdemin/pip-compile-multi/releases)
- [Changelog](https://github.com/peterdemin/pip-compile-multi/blob/master/HISTORY.rst)
- [Commits](peterdemin/pip-compile-multi@v2.6.1...v2.6.2)

---
updated-dependencies:
- dependency-name: pip-compile-multi
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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

requirements/integration.txt

@@ -29,7 +29,7 @@ packaging==21.3
     #   tox
 pep517==0.11.0
     # via build
-pip-compile-multi==2.6.1
+pip-compile-multi==2.6.2
     # via -r integration.in
 pip-tools==6.8.0
     # via pip-compile-multi