Update donation button and reference Bridge Foundry

Bridge Foundry is its own nonprofit organization now instead of being
under School Factory. As an official chapter, we have to update our copy
and donation button to reflect this transition.

app/assets/stylesheets/_donate.scss

@@ -102,3 +102,8 @@
   max-width: 0.5em;
   vertical-align: top;
 }
+
+.donation-note {
+  margin-bottom: 1.5rem;
+  display: block;
+}

app/views/pages/donate.html.erb

@@ -9,7 +9,13 @@
   </h2>
 
   <p>
-    If your <strong>company or organization</strong> can help us make tech more welcoming and more diverse, we'd love your help. We're always looking for sponsors to help cover the cost of food and drinks for the workshop.
+    We're always looking for sponsors to help cover expenses we incur in order
+    to run our workshops. This includes, but is not limited to, the cost of food
+    and drinks for our students and volunteers.
+  </p>
+
+  <p>
+    If you or your organization would like to help offset these costs, let's chat!
   </p>
 
   <ul class="organization-cta">
@@ -18,12 +24,17 @@
   </ul>
 
   <p>
-    If you'd like to contribute as an <strong>individual</strong>, you can do so via PayPal.
+    If you'd like to make a contribution without being an official sponsor, you can do so using the button below.
   </p>
 
+  <small class="donation-note">
+    All donations are provided to Bridge Foundry, Inc. as
+    <a href="https://rebrand.ly/bridge-foundry-unrestricted-funds">unrestricted funds</a>.
+  </small>
+
   <form action="https://www.paypal.com/cgi-bin/webscr" method="post" target="_top" class="donate-form">
     <input type="hidden" name="cmd" value="_s-xclick">
-    <input type="hidden" name="hosted_button_id" value="73FLE9A86Y9EW">
+    <input type="hidden" name="hosted_button_id" value="UFFZA5FSXL5GL">
     <input type="submit" value="Support RailsBridge Boston">
     <img alt="" border="0" src="https://www.paypalobjects.com/en_US/i/scr/pixel.gif" width="1" height="1">
   </form>