doc: Update README.md

say thanks badge was broken, test badge had wrong url.

Signed-off-by: Christina Sørensen <christina@cafkafk.com>

README.md

@@ -6,8 +6,7 @@ eza is a modern replacement for _ls_.
 
 **README Sections:** [Options](#options) — [Installation](#installation) — [Development](#development)
 
-[![Unit tests](https://github.com/ogham/exa/actions/workflows/unit-tests.yml/badge.svg)](https://github.com/ogham/exa/actions/workflows/unit-tests.yml)
-[![Say thanks!](https://img.shields.io/badge/Say%20Thanks-!-1EAEDB.svg)](https://saythanks.io/to/ogham%40bsago.me)
+[![Unit tests](https://github.com/cafkafk/eza/actions/workflows/unit-tests.yml/badge.svg)](https://github.com/cafkafk/eza/actions/workflows/unit-tests.yml)
 </div>
 
 ![Screenshots of exa](screenshots.png)