build(deps): update urllib3 requirement from <2 to <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@0.3...2.2.2)

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

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

pyproject.toml

@@ -58,7 +58,7 @@ dev = [
     "types-python-dateutil>=2.8.19,<2.10.0",
     "types-requests~=2.31.0",
     # temporary pin https://github.com/stac-utils/pystac-client/issues/509
-    "urllib3<2",
+    "urllib3<3",
 ]
 docs = [
     "Sphinx~=8.0",