Update urllib3 requirement from >=1.15 to >=2.6.3

Updates the requirements on [urllib3](https://github.com/urllib3/urllib3) to permit the latest version.
- [Release notes](https://github.com/urllib3/urllib3/releases)
- [Changelog](https://github.com/urllib3/urllib3/blob/main/CHANGES.rst)
- [Commits](urllib3/urllib3@1.15...2.6.3)

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

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

Author: dependabot[bot]

pyproject.toml

@@ -26,7 +26,7 @@ ama = [
   "azure-mgmt-resource",
   "azure-storage-blob",
   "azure-identity>=1.2.0",
-  "urllib3>=1.15",
+  "urllib3>=2.6.3",
   "six>=1.10",
   "certifi",
   "python-dateutil",