Update header.html

Author: Andrew

_includes/header.html

@@ -115,7 +115,7 @@
 			{% if page.id == 'africa' %}
 			<a class="btn-alt" href="https://forms.gle/5jAoJbj5uJouvYBu9" target="_blank">
 				<div>
-					<span>Join the Community</span>
+					<span>Join All In Africa</span>
 					{% include arrow.html %}
 				</div>
 			</a>
@@ -211,7 +211,7 @@
 					{% if page.id == 'africa' %}
 			<a class="btn" href="https://forms.gle/5jAoJbj5uJouvYBu9" target="_blank">
 
-					<span>Join the Community</span>
+					<span>Join All In Africa</span>
 					{% include arrow.html %}
 
 			</a>