Update JGit Submodule to 2021ce342.

This includes the following changes:
2021ce342 (HEAD -> insync, origin/master, origin/HEAD) ObjectDirectory: avoid using File.getCanonicalPath()
eb5124c74 AutoCRLFOutputStream: use BufferedOutputStream
f71fcbf36 CloneCommand: set HEAD also when not checking out
4f4204914 Pass on shallowSince only if not null
ccad49a28 Fix wrong @since tag
21a497843 Merge "Split out ApplyCommand logic to PatchApplier class"
acde6c8f5 (newapplier) Split out ApplyCommand logic to PatchApplier class

Release-Notes: Update jgit to 2021ce342.
Change-Id: I265aadb19d56d2eb1269debc9688c67805ac2c87
diff --git a/modules/jgit b/modules/jgit
index 85182df..2021ce3 160000
--- a/modules/jgit
+++ b/modules/jgit
@@ -1 +1 @@
-Subproject commit 85182df26779dd6373d188b6adc936454b4c9189
+Subproject commit 2021ce3423a7db6949b9e0a71a8c15e5826ccc4c