deps: Update dependency urllib3 to v1.26.16 (#102)

Author: renovate-bot

.kokoro/requirements.txt

@@ -387,9 +387,9 @@ typing-extensions==4.4.0 \
  --hash=sha256:1511434bb92bf8dd198c12b1cc812e800d4181cfcb867674e0f8279cc93087aa \
  --hash=sha256:16fa4864408f655d35ec496218b85f79b3437c829e93320c7c9215ccfd92489e
  # via -r requirements.in
-urllib3==1.26.12 \
- --hash=sha256:3fa96cf423e6987997fc326ae8df396db2a8b7c667747d47ddd8ecba91f4a74e \
- --hash=sha256:b930dd878d5a8afb066a637fbb35144fe7901e3b209d1cd4f524bd0e9deee997
+urllib3==1.26.16 \
+ --hash=sha256:8d36afa7616d8ab714608411b4a3b13e58f463aee519024578e062e141dce20f \
+ --hash=sha256:8f135f6502756bde6b2a9b28989df5fbe87c9970cecaa69041edcce7f0589b14
  # via requests
 wheel==0.38.4 \
  --hash=sha256:965f5259b566725405b05e7cf774052044b1ed30119b5d586b2703aafe8719ac \