docs(prebuilds): prebuild instructions for the M1 processor

Author: DavidVujic

prebuilds/README.md

@@ -12,6 +12,11 @@ npx prebuildify --arch x64 --platform darwin --target 14.15.4
 npx prebuildify --arch x64 --platform darwin --target 16.13.1
 ```
 
+Prebuilds for Mac OS X with the M1 processor:
+```bash
+npx prebuildify --arch arm64 --platform darwin --target 16.13.1
+```
+
 Create prebuilds for Windows 10:
 
 ```bash