build(deps): bump org.eclipse.jgit:org.eclipse.jgit

Bumps org.eclipse.jgit:org.eclipse.jgit from 6.6.0.202305301015-r to 6.8.0.202311291450-r.

---
updated-dependencies:
- dependency-name: org.eclipse.jgit:org.eclipse.jgit
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

Author: dependabot[bot]

gradle/libs.versions.toml

@@ -37,7 +37,7 @@ ajalt-mordant                  = "2.3.0"
 ajalt-colormath                = "3.4.0"
 dokka                          = "1.9.10"
 helidon                        = "4.0.5"
-jgit                           = "6.6.0.202305301015-r"
+jgit                           = "6.8.0.202311291450-r"
 jte                            = "3.1.9"
 junit                          = "5.10.2"
 ktor                           = "3.0.0-beta-1"