Bump psutil from 5.9.2 to 5.9.3

Bumps [psutil](https://github.com/giampaolo/psutil) from 5.9.2 to 5.9.3.
- [Release notes](https://github.com/giampaolo/psutil/releases)
- [Changelog](https://github.com/giampaolo/psutil/blob/master/HISTORY.rst)
- [Commits](giampaolo/psutil@release-5.9.2...release-5.9.3)

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

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

requirements.txt

@@ -131,7 +131,7 @@ pylibmc==1.6.3
 sherlock==0.4.0
 
 # required by monitoring
-psutil==5.9.2
+psutil==5.9.3
 django-cors-headers==3.13.0
 user-agents
 django-user-agents