Update README.MD

SecureCRT.SecureFX/arm64/README.MD

@@ -1,4 +1,4 @@
-# e8bd4b325a78f695aefb8885d3660fdd
+# md5: e8bd4b325a78f695aefb8885d3660fdd
 ```
 split -b 20m -d -a 3 ../scrt-sfx-9.5.2-3325.macos_arm64.dmg scrt-sfx-9.5.2-3325.macos_arm64.dmg.