Update support link for project donations

Author: Nowosad

style/bs4_book.html

@@ -99,7 +99,7 @@ <h2>Second Edition</h2>
           <li><a href="https://discord.gg/PMztXYgNxp">Chat on Discord <i class="fab fa-discord"></i></a></li>
           <li><a href="https://r.geocompx.org/solutions/">Check exercise solutions <i class="fa fa-check"></i></a></li>
           <li><a href="https://supportukrainenow.org/">Support Ukraine 🇺🇦</a></li>
-          <li><a href="https://donate.stripe.com/4gweWl94Q9E35AQ6oo">Support this project 💸</a></li>
+          <li><a href="https://geocompx.org/support">Support this project 💸</a></li>
         </ul>
         <hr>
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