update readme

Author: hlolli

README.md

@@ -20,7 +20,7 @@ You can install `csound-mode` from `MELPA` using the following command:
 
 <kbd>M-x package-install [RET] csound-mode [RET]</kbd>
 
-Alternatively, download latest release: https://github.com/hlolli/csound-mode/releases/download/v0.1/csound-mode-0.1.zip
+Alternatively, [download latest release.](https://github.com/hlolli/csound-mode/releases/download/v0.1/csound-mode-0.1.zip)
 and add it manually to load-path like shown here:
 
 ```el