Update JGit to dc27dbd2f

$ git log --oneline --no-merges 42917767f..dc27dbd2f
5705e2af1 [errorprone] Fix InconsistentCapitalization
5138b97b6 TestRepository: Add getInstant method
790fa7e81 Update orbit to orbit-aggregation/2023-12
e0acf2579 Prepare 6.8.0-SNAPSHOT builds
e5a79343c JGit v6.8.0.202310031045-m1

Change-Id: Ib9501a1538cdae2161a56094309cb7adee2f7f12

modules/jgit

diff --git a/modules/jgit b/modules/jgit
index 4291776..dc27dbd 160000
--- a/modules/jgit
+++ b/modules/jgit
@@ -1 +1 @@
-Subproject commit 42917767f9bfe42218e0069d1eed259460c3972e
+Subproject commit dc27dbd2fef79a43f2e44ee1264777da9fbeaabb