Bump twisted from 20.3.0 to 23.8.0 in /python3.6

Bumps [twisted](https://github.com/twisted/twisted) from 20.3.0 to 23.8.0.
- [Release notes](https://github.com/twisted/twisted/releases)
- [Changelog](https://github.com/twisted/twisted/blob/trunk/NEWS.rst)
- [Commits](twisted/twisted@twisted-20.3.0...twisted-23.8.0)

---
updated-dependencies:
- dependency-name: twisted
  dependency-type: direct:production
...

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

python3.6/requirements.txt

@@ -20,7 +20,7 @@ requests == 2.21.0
 scrapy == 1.6.0
 simplejson == 3.16.0
 virtualenv == 16.3.0
-twisted == 20.3.0
+twisted == 23.8.0
 
 # packages for numerics
 numpy == 1.16.1