Merge pull request #1923 from theupdateframework/dependabot/pip/urllib3-1.26.9

build(deps): bump urllib3 from 1.26.8 to 1.26.9

Author: Jussi Kukkonen

requirements-pinned.txt

@@ -7,4 +7,4 @@ pycparser==2.21           # via cffi
 pynacl==1.5.0             # via securesystemslib
 requests==2.27.1
 securesystemslib[crypto,pynacl]==0.22.0
-urllib3==1.26.8           # via requests
+urllib3==1.26.9           # via requests