Update jgit to 4560bdf7e
Update jgit to 4560bdf7e

This update includes the following commits:

4560bdf7e Migrate to Apache MINA sshd 2.6.0 and Orbit I20210203173513
083e6fd70 LFSPointerTest: suppress errorprone error [SelfComparison]
8ad53baa1 Fix bazel tests broken by classes moved in dbd05433
b6fe0300f Merge branch 'stable-5.11'
43b651ea9 Prepare 5.11.0-SNAPSHOT builds
247babb60 JGit v5.11.0.202102031030-m2
91ddc0e28 IO: fix IO.readFully(InputStream, byte[], int)
aa052ea09 LFS: make pointer parsing more robust
9109cb9d2 [pgm] add option --timeout to clone command

Change-Id: I95cde01a88c3d0fad93fd422e0ae15b4d1d5b7c2

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