Update ruff requirement from <0.5.5 to <0.5.6 (#257)

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

pyproject.toml

@@ -38,7 +38,7 @@ lint = [
   "mypy",
   # NOTE(ww): ruff is under active development, so we pin conservatively here
   # and let Dependabot periodically perform this update.
-  "ruff < 0.5.5",
+  "ruff < 0.5.6",
   "types-requests",
 ]
 dev = ["build", "bump >= 1.3.2", "id[test,lint]"]