chore(deps): update packaging requirement from >=22 to >=26.3 (#527)

---
updated-dependencies:
- dependency-name: packaging
  dependency-version: '26.3'
  dependency-type: direct:production
...

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: dependabot[bot]

requirements-testing.txt

@@ -18,5 +18,5 @@ deadline-cloud-test-fixtures >= 0.18.18
 # Used by test/integ/.
 xa11y >= 0.13.0
 # Both are used by test_console_signin_dependencies.py, which parses pyproject.toml.
-packaging >= 22
+packaging >= 26.3
 tomli == 2.*; python_version < "3.11"