Upgrade JGit to 5.8.1.202007141445-r

Aligns with the version used in core Gerrit 3.2.3. This is also the
version on which Gerrit master has its upstream JGit commit based on.

Change-Id: Idafd83e4b11c9896ecec932fccb055bf628b0f88
diff --git a/external_plugin_deps.bzl b/external_plugin_deps.bzl
index 077599a..5687d0d 100644
--- a/external_plugin_deps.bzl
+++ b/external_plugin_deps.bzl
@@ -100,8 +100,8 @@
     maven_jar(
         name = "jgit",
         artifact =
-            "org.eclipse.jgit:org.eclipse.jgit:5.8.0.202006091008-r",
-        sha1 = "1d8b1a904ae018e9973f6bd92f71065c629393e3",
+            "org.eclipse.jgit:org.eclipse.jgit:5.8.1.202007141445-r",
+        sha1 = "3b200e97843918969d0375a6e2184990b8e731e9",
     )
 
     maven_jar(