Add missing wget command for easy cut copy paste. (#5609)

We should keep this for easy one click copy paste on remote servers 
rather than 2 things for users to deal with.

README.md

@@ -48,6 +48,7 @@ chmod 755 minio
 | ----------| -------- | ------|
 |GNU/Linux|64-bit Intel|https://dl.minio.io/server/minio/release/linux-amd64/minio |
 ```sh
+wget https://dl.minio.io/server/minio/release/linux-amd64/minio
 chmod +x minio
 ./minio server /data
 ```
@@ -117,4 +118,4 @@ Please follow Minio [Contributor's Guide](https://github.com/minio/minio/blob/ma
 
 
 ## License
-[![FOSSA Status](https://app.fossa.io/api/projects/git%2Bgithub.com%2Fminio%2Fminio.svg?type=large)](https://app.fossa.io/projects/git%2Bgithub.com%2Fminio%2Fminio?ref=badge_large)
+[![FOSSA Status](https://app.fossa.io/api/projects/git%2Bgithub.com%2Fminio%2Fminio.svg?type=large)](https://app.fossa.io/projects/git%2Bgithub.com%2Fminio%2Fminio?ref=badge_large)