Bump spin from 0.14 to 0.15 in the actions group (#164)

Author: dependabot[bot]

pyproject.toml

@@ -27,7 +27,7 @@ dependencies = [
 [project.optional-dependencies]
 test = ["pytest >= 8.0", "pytest-cov >= 5.0", "coverage[toml] >= 7.2"]
 lint = ["pre-commit == 4.3.0"]
-dev = ["changelist == 0.5", "spin == 0.14"]
+dev = ["changelist == 0.5", "spin == 0.15"]
 
 [project.urls]
 Home = "https://scientific-python.org/specs/spec-0001/"