update readme

README.md

@@ -9,22 +9,26 @@ The retries exponentially increase and stop increasing when a certain threshold
 
 ## Usage
 
-Import path is `github.com/cenkalti/backoff/v4`. Please note the version part at the end.
+Import path is `github.com/cenkalti/backoff/v5`. Please note the version part at the end.
 
-Use https://pkg.go.dev/github.com/cenkalti/backoff/v4 to view the documentation.
+For most cases, use [`Retry`][retry-doc] function. See [example_test.go][example] for an example.
+
+If you have specific needs, copy the [`Retry`][retry-src] function into your code and modify it as needed.
 
 ## Contributing
 
 * I would like to keep this library as small as possible.
 * Please don't send a PR without opening an issue and discussing it first.
 * If proposed change is not a common use case, I will probably not accept it.
 
-[godoc]: https://pkg.go.dev/github.com/cenkalti/backoff/v4
+[godoc]: https://pkg.go.dev/github.com/cenkalti/backoff/v5
 [godoc image]: https://godoc.org/github.com/cenkalti/backoff?status.png
 [coveralls]: https://coveralls.io/github/cenkalti/backoff?branch=master
 [coveralls image]: https://coveralls.io/repos/github/cenkalti/backoff/badge.svg?branch=master
 
 [google-http-java-client]: https://github.com/google/google-http-java-client/blob/da1aa993e90285ec18579f1553339b00e19b3ab5/google-http-client/src/main/java/com/google/api/client/util/ExponentialBackOff.java
 [exponential backoff wiki]: http://en.wikipedia.org/wiki/Exponential_backoff
 
-[advanced example]: https://pkg.go.dev/github.com/cenkalti/backoff/v4?tab=doc#pkg-examples
+[retry-doc]: https://pkg.go.dev/github.com/cenkalti/backoff/v5#Retry
+[retry-src]: https://github.com/cenkalti/backoff/blob/v5/retry.go
+[example]: https://github.com/cenkalti/backoff/blob/v5/example_test.go