chore: replace pip3 install with pipx install

Co-authored-by: Waldir Pimenta <[email protected]>

Author: SethFalco

index.html

@@ -57,8 +57,8 @@ <h2 id="installation">
         Installation
       </h2>
 
-      <p>As of now, our most mature client is the Python one, which you can easily install via pip3:</p>
-      <pre>pip3 install tldr</pre>
+      <p>As of now, our most mature client is the Python one, which you can easily install via <a href="https://github.com/pypa/pipx" target="_blank">pipx</a>:</p>
+      <pre>pipx install tldr</pre>
 
       <p>
         There are many more clients that have sprouted from the community, including: