Merge pull request #1468 from theupdateframework/dependabot/pip/urllib3-1.26.6

build(deps): bump urllib3 from 1.26.5 to 1.26.6

Author: Jussi Kukkonen

requirements-pinned.txt

@@ -7,4 +7,4 @@ pycparser==2.20           # via cffi
 pynacl==1.4.0             # via securesystemslib
 requests==2.25.1
 securesystemslib[crypto,pynacl]==0.20.1
-urllib3==1.26.5           # via requests
+urllib3==1.26.6           # via requests