Rakhmatullin Farid

Change sleep time in exp lru test and readme

1

Related to https://github.com/hashicorp/golang-lru/issues/157

Example output is not matched with actual output

4

Hi, I tried [this ](https://github.com/hashicorp/golang-lru#expirable-lru-cache-example) example (go version go1.21.1 linux/amd64) And instead of ``` value before expiration is found: true, value: "val1" value after expiration is found: false, value: ""...