Merge pull request #2329 from theupdateframework/dependabot/pip/urllib3-1.26.15

build(deps): bump urllib3 from 1.26.14 to 1.26.15

Author: Lukas Pühringer

requirements/pinned.txt

@@ -7,4 +7,4 @@ pycparser==2.21           # via cffi
 pynacl==1.5.0             # via securesystemslib
 requests==2.28.2
 securesystemslib[crypto,pynacl]==0.26.0
-urllib3==1.26.14           # via requests
+urllib3==1.26.15           # via requests