go/README: add links for Reader/Writer interface
# Go bindings for Motr - go/mio
-`go/mio` Go package implements Reader/Writer interface over Motr client I/O API.
+`go/mio` Go package implements
+[Reader](https://pkg.go.dev/io#Reader) /
+[Writer](https://pkg.go.dev/io#Writer)
+interface over Motr client I/O API.
This allows writing Motr client applications quickly and efficiently in the Go language.
`go/mio` automatically determines the optimal unit (stripe) size for the newly created object
