[DO NOT MERGE] Donate Button (#123)

needs to run local, could not get it on my machine, me and ruby..... we
dont see "eye to eye" on things......

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### 📘 Glossary
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Author: JMStudiosJoe

_includes/donateButton.html

@@ -0,0 +1,3 @@
+<a href="https://www.paypal.com/donate/?hosted_button_id=RH4Y34HGQ535S" target="_blank">
+    Donate
+</a>

_includes/navigation.html

@@ -5,3 +5,4 @@
 <!-- <a href="https://apply.codeforsanjose.org/donate"
   target="_blank" rel="noopener noref">Donate</a> -->
 <a href="./faq.html">FAQ</a>
+{% include donateButton.html %}