update reamde

Author: arch

contrib/Installer/assets/README.md

@@ -0,0 +1,5 @@
+# Installer Assets
+
+- I have to include `libssl-1_1-x64.dll` and `libcrypto-1_1-x64.dll` in this repository because the Windows GitHub action build environment do not contain this dlls.
+
+- `main.lua` is the extension wrapper lua script for the motion tracking funscript generator.