chore(deps): update deadline requirement

Updates the requirements on [deadline](https://github.com/aws-deadline/deadline-cloud) to permit the latest version.
- [Release notes](https://github.com/aws-deadline/deadline-cloud/releases)
- [Changelog](https://github.com/aws-deadline/deadline-cloud/blob/mainline/CHANGELOG.md)
- [Commits](aws-deadline/deadline-cloud@0.59.0...0.60.0)

---
updated-dependencies:
- dependency-name: deadline
  dependency-version: 0.60.0
  dependency-type: direct:production
...

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

Author: dependabot[bot]

pyproject.toml

@@ -30,15 +30,15 @@ classifiers = [
 ]
 
 dependencies = [
-    "deadline[gui] >= 0.59, <0.60",
+    "deadline[gui] >= 0.59, < 0.61",
     "openjd-adaptor-runtime >= 0.7,< 0.10",
     # fonttools is Windows-only due to Cinema 4D technical limitations
     "fonttools >=4.59.2, <4.64; sys_platform == 'win32'",
 ]
 
 [project.optional-dependencies]
 gui = [
-    "deadline[gui] >= 0.59, <0.60",
+    "deadline[gui] >= 0.59, < 0.61",
     "PySide6-Essentials == 6.8.3",  # Use 6.8 to align with VFXP 2026: https://vfxplatform.com/#reference-platform
 ]