Bump urllib3

Bumps [urllib3](https://github.com/urllib3/urllib3) from 2.6.0 to 2.6.3.
- [Release notes](https://github.com/urllib3/urllib3/releases)
- [Changelog](https://github.com/urllib3/urllib3/blob/main/CHANGES.rst)
- [Commits](urllib3/urllib3@2.6.0...2.6.3)

---
updated-dependencies:
- dependency-name: urllib3
  dependency-version: 2.6.3
  dependency-type: direct:production
...

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]

community-content/vertex-distributed-training/a3mega/llama-3-8b-nemo-pretraining/docker/requirements.txt

@@ -5,6 +5,6 @@ immutabledict==4.2.1
 protobuf==4.25.8
 opencv-python-headless==4.11.0.86
 docutils==0.16
-urllib3==2.6.0
+urllib3==2.6.3
 google-cloud-storage==3.0.0
 retrying

community-content/vertex-distributed-training/a3mega/llama-3-8b-nemo-pretraining/requirements.txt

@@ -45,5 +45,5 @@ six==1.17.0
 sniffio==1.3.1
 typing-inspection==0.4.0
 typing_extensions==4.13.2
-urllib3==2.6.0
+urllib3==2.6.3
 websockets==15.0.1