Update INSTALL_MAKE path to INSTALL_MAKE.md (#446)

Included for #429
2020-02-03 15:02:40 -08:00 · 2020-02-03 15:02:40 -08:00 · 14a7db0eaa
--- a/README.md
+++ b/README.md
@ -12,5 +12,5 @@ the revised BSD license.
 [Web site source code](https://github.com/libssh2/www)

 Installation instructions:
- - [for CMake](docs/INSTALL_CMAKE)
+ - [for CMake](docs/INSTALL_CMAKE.md)
 - [for autotools](docs/INSTALL_AUTOTOOLS)