Bump go-git

vendor/github.com/go-git/go-billy/v5/osfs/os_posix.go

@@ -1,9 +1,11 @@
-// +build !plan9,!windows
+//go:build !plan9 && !windows && !wasm
+// +build !plan9,!windows,!wasm
 
 package osfs
 
 import (
 	"os"
+	"syscall"
 
 	"golang.org/x/sys/unix"
 )
@@ -25,3 +27,12 @@ func (f *file) Unlock() error {
 func rename(from, to string) error {
 	return os.Rename(from, to)
 }
+
+// umask sets umask to a new value, and returns a func which allows the
+// caller to reset it back to what it was originally.
+func umask(new int) func() {
+	old := syscall.Umask(new)
+	return func() {
+		syscall.Umask(old)
+	}
+}