added 'The Illustrated TLS Connection'

- signed-off-by: trimstray <trimstray@gmail.com>

README.md

@@ -309,6 +309,7 @@ performance of any of your sites from across the globe.<br>
 &nbsp;&nbsp;:small_orange_diamond: <a href="https://guif.re/"><b>Guifre Ruiz Notes</b></a> - collection of secuirty, system, network and pentest cheatsheets.<br>
 &nbsp;&nbsp;:small_orange_diamond: <a href="https://inventory.rawsec.ml/index.html"><b>Rawsec's CyberSecurity Inventory</b></a> - an inventory of tools and resources about CyberSecurity.<br>
 &nbsp;&nbsp;:small_orange_diamond: <a href="https://appsecwiki.com/#/"><b>Application Security Wiki</b></a> - is an initiative to provide all application security related resources at one place.<br>
+&nbsp;&nbsp;:small_orange_diamond: <a href="https://tls.ulfheim.net/"><b>The Illustrated TLS Connection</b></a> - every byte of a TLS connection explained and reproduced.<br>
 </p>
 
 ##### :black_small_square: Pentesting