添加升级文件签名
diff --git a/.sign_salt b/.sign_salt
new file mode 100644
index 0000000..47e24b0
--- /dev/null
+++ b/.sign_salt
@@ -0,0 +1 @@
+nzoqPYMIu91VViA/mEIG5FtJXi8=
\ No newline at end of file