Fix readme

README.md

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 # EasyCache
+<p align="center">
 
 [![Gem Version](https://badge.fury.io/rb/easycache.svg)](https://badge.fury.io/rb/easycache)
 ![License](https://img.shields.io/badge/license-AGPL%203.0-blue.svg)
 [![Lint](https://github.com/malvads/easycache/actions/workflows/lint.yml/badge.svg)](https://github.com/malvads/easycache/actions/workflows/lint.yml)
 [![Tests](https://github.com/malvads/easycache/actions/workflows/tests.yml/badge.svg)](https://github.com/malvads/easycache/actions/workflows/tests.yml)
 [![Build](https://github.com/malvads/easycache/actions/workflows/build.yml/badge.svg)](https://github.com/malvads/easycache/actions/workflows/build.yml)
-
+</p>
 EasyCache is an in-memory cache system for Ruby designed for situations where you don't want to set up Redis or Memcached but still need a simple solution for caching key-value data.
 
 ## Usage