Bump simplejson from 3.17.5 to 3.17.6

Bumps [simplejson](https://github.com/simplejson/simplejson) from 3.17.5 to 3.17.6.
- [Release notes](https://github.com/simplejson/simplejson/releases)
- [Changelog](https://github.com/simplejson/simplejson/blob/master/CHANGES.txt)
- [Commits](https://github.com/simplejson/simplejson/compare/v3.17.5...v3.17.6)

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

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

requirements.txt

@@ -17,7 +17,7 @@ Pillow==8.4.0
 psycopg2-binary==2.9.2
 python-dotenv==0.19.2
 requests==2.26.0
-simplejson==3.17.5
+simplejson==3.17.6
 six==1.16.0
 webdavclient3==3.14.6
 whitenoise==5.3.0