chore(deps): bump urllib3 from 1.26.17 to 1.26.18 in /.kokoro (#456)

Source-Link: googleapis/synthtool@d52e638
Post-Processor: gcr.io/cloud-devrel-public-resources/owlbot-python:latest@sha256:4f9b3b106ad0beafc2c8a415e3f62c1a0cc23cabea115dbe841b848f581cfe99

Co-authored-by: Owl Bot <gcf-owl-bot[bot]@users.noreply.github.com>

Author: gcf-owl-bot[bot]

packages/google-cloud-error-reporting/.github/.OwlBot.lock.yaml

@@ -13,5 +13,5 @@
 # limitations under the License.
 docker:
   image: gcr.io/cloud-devrel-public-resources/owlbot-python:latest
-  digest: sha256:08e34975760f002746b1d8c86fdc90660be45945ee6d9db914d1508acdf9a547
-# created: 2023-10-09T14:06:13.397766266Z
+  digest: sha256:4f9b3b106ad0beafc2c8a415e3f62c1a0cc23cabea115dbe841b848f581cfe99
+# created: 2023-10-18T20:26:37.410353675Z

packages/google-cloud-error-reporting/.kokoro/requirements.txt

@@ -467,9 +467,9 @@ typing-extensions==4.4.0 \
     --hash=sha256:1511434bb92bf8dd198c12b1cc812e800d4181cfcb867674e0f8279cc93087aa \
     --hash=sha256:16fa4864408f655d35ec496218b85f79b3437c829e93320c7c9215ccfd92489e
     # via -r requirements.in
-urllib3==1.26.17 \
-    --hash=sha256:24d6a242c28d29af46c3fae832c36db3bbebcc533dd1bb549172cd739c82df21 \
-    --hash=sha256:94a757d178c9be92ef5539b8840d48dc9cf1b2709c9d6b588232a055c524458b
+urllib3==1.26.18 \
+    --hash=sha256:34b97092d7e0a3a8cf7cd10e386f401b3737364026c45e622aa02903dffe0f07 \
+    --hash=sha256:f8ecc1bba5667413457c529ab955bf8c67b45db799d159066261719e328580a0
     # via
     #   requests
     #   twine