build(deps): bump ruff from 0.6.7 to 0.6.8

Bumps [ruff](https://github.com/astral-sh/ruff) from 0.6.7 to 0.6.8.
- [Release notes](https://github.com/astral-sh/ruff/releases)
- [Changelog](https://github.com/astral-sh/ruff/blob/main/CHANGELOG.md)
- [Commits](astral-sh/ruff@0.6.7...0.6.8)

---
updated-dependencies:
- dependency-name: ruff
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

Signed-off-by: dependabot[bot] <[email protected]>

pyproject.toml

@@ -30,7 +30,7 @@ dev = [
     "pytest-cov~=5.0",
     "pytest~=8.2",
     "requests~=2.32",
-    "ruff==0.6.7",
+    "ruff==0.6.8",
 ]
 docs = ["pystac~=1.10", "ipykernel~=6.29", "jinja2~=3.1"]