Use new 'vavrjava' ASCII art in README (#2921)

README.md

@@ -6,9 +6,11 @@
 [![Build Status](https://github.com/vavr-io/vavr/actions/workflows/build.yml/badge.svg)](https://github.com/vavr-io/vavr/actions/workflows/build.yml)
 [![Code Coverage](https://codecov.io/gh/vavr-io/vavr/branch/master/graph/badge.svg)](https://codecov.io/gh/vavr-io/vavr)
 
-<p align="center">
-  <img src="https://user-images.githubusercontent.com/743833/62367542-486f0500-b52a-11e9-815e-e9788d4c8c8d.png" alt="Vavr's custom image"/>
-</p>
+```text
+ ____  ______________  ________________________  __________
+ \   \/   /      \   \/   /   __/   /      \   \/   /      \
+  \______/___/\___\______/___/_____/___/\___\______/___/\___\
+```
 
 Vavr is an object-functional language extension to Java 8 that aims to reduce the number of lines of code and increase code quality.
 It provides persistent collections, functional abstractions for error handling, concurrent programming, pattern matching, and much more.