Bump vendored libgit2 to ee89941fa
diff --git a/vendor/libgit2 b/vendor/libgit2
index ae5838f..ee89941 160000
--- a/vendor/libgit2
+++ b/vendor/libgit2
@@ -1 +1 @@
-Subproject commit ae5838f118a4819e608990a815bf8fc482be5772
+Subproject commit ee89941fa2b861332defb5e3a8ce12c23c496ed7