add yaml for pattern library

Author: AJ Griffiths

tbx/project_styleguide/templates/patterns/molecules/streamfield/blocks/sticky_call_to_action.yaml

@@ -0,0 +1,12 @@
+context:
+  value:
+    call_to_action:
+      - value:
+          text: Get in touch to learn about our journey to becoming employee-owned
+          # description: '<p>Speak to our team to boost regular giving, improve supporter loyalty, or mobilise people behind your cause.</p>'
+          button_text: 'Contact Us'
+          button_link:
+            - pipedrive_link:
+              url: 'https://example.com'
+    sticky_text: Get in touch
+    sticky_subtext: learn about our journey