Bump vulture from 2.7 to 2.8

Bumps [vulture](https://github.com/jendrikseipp/vulture) from 2.7 to 2.8.
- [Release notes](https://github.com/jendrikseipp/vulture/releases)
- [Changelog](https://github.com/jendrikseipp/vulture/blob/main/CHANGELOG.md)
- [Commits](https://github.com/jendrikseipp/vulture/compare/v2.7...v2.8)

---
updated-dependencies:
- dependency-name: vulture
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <support@github.com>

Pipfile

@@ -62,7 +62,7 @@ gds-metrics = {version = "==0.2.4", ref = "6f1840a57b6fb1ee40b7e84f2f18ec229de8a
 packaging = "==23.1"
 notifications-utils = {editable = true, ref = "main", git = "https://github.com/GSA/notifications-utils.git"}
 newrelic = "*"
-vulture = "==2.7"
+vulture = "==2.8"
 
 [dev-packages]
 exceptiongroup = "==1.1.2"