Update dependency ruff to >=0.15.9,<0.16

Author: renovate[bot]

pyproject.toml

@@ -25,7 +25,7 @@ dependencies = [
     "polars-lts-cpu[pyarrow]>=1.31.0,<2",
     "python-multipart>=0.0.20,<0.0.21",
     "numpy>=2.3.1,<3",
-    "ruff>=0.12.2,<0.13",
+    "ruff>=0.15.9,<0.16",
     "nbformat>=5.10.4,<6",
     "vl-convert-python>=1.8.0,<2",
     "tqdm>=4.67.1,<5",