Bump urllib3 from 1.26.15 to 1.26.16

Bumps [urllib3](https://github.com/urllib3/urllib3) from 1.26.15 to 1.26.16
- [Release notes](https://github.com/urllib3/urllib3/releases)
- [Changelog](https://github.com/urllib3/urllib3/blob/main/CHANGES.rst)
- [Commits](urllib3/urllib3@1.26.15...1.26.16

---
updated-dependencies:
- dependency-name: urllib3
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

CHANGELOG.md

@@ -7,6 +7,10 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ## [Unreleased]
 
+### Changed
+
+- dependabot: Bump `urllib3` from 1.26.15 to 1.26.16
+
 ## [1.8.9] - 2023-07-05
 
 ### Added

constraints.txt

@@ -16,5 +16,5 @@ requests==2.31.0
 requests-oauthlib==1.3.1
 rsa==4.9
 six==1.16.0
-urllib3==1.26.15
+urllib3==1.26.16
 websocket-client==1.6.1