pip(deps): bump moto from 2.2.4 to 2.2.6

Bumps [moto](https://github.com/spulec/moto) from 2.2.4 to 2.2.6.
- [Release notes](https://github.com/spulec/moto/releases)
- [Changelog](https://github.com/spulec/moto/blob/master/CHANGELOG.md)
- [Commits](getmoto/moto@2.2.4...2.2.6)

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

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

requirements/DEV_REQUIREMENTS.txt

@@ -2,7 +2,7 @@ black==21.7b0
 coveralls==3.2.0
 coverage==5.5
 isort==5.9.3
-moto==2.2.4
+moto==2.2.6
 portray==1.7.0
 pytest==6.2.4
 pytest-cov==2.12.1