git: update to v2.21.0

[ps-cgit] / git

diff --git a/git b/git
index 5d826e972970a784bd7a7bdf587512510097b8c7..8104ec994ea3849a968b4667d072fedd1e688642 160000 (submodule)
--- a/git
+++ b/git
@@ -1 +1 @@
-Subproject commit 5d826e972970a784bd7a7bdf587512510097b8c7
+Subproject commit 8104ec994ea3849a968b4667d072fedd1e688642