PPHA-744: Start page updates (#407)

# What is the change?

Change to start page text.

# Why are we making this change?

Updating start page to match design.

Author: jamiefalcus

lung_cancer_screening/questions/jinja2/start.jinja

@@ -8,6 +8,7 @@
 
       <p>We are testing a new online questionnaire for lung cancer screening. This service will ask you some questions about your medical history and lifestyle.</p>
       <p>This online service cannot currently recommend if you need a lung scan. Once you have completed the online service you will need to call us to repeat the questionnaire by phone.</p>
+      <p>The answers you submit will not be shared with your patient care advisor during your phone appointment, or with your GP.</p>
       <p>As a thank you for testing the online service, we will offer you a £10 voucher once you have completed both the online service and your phone appointment.</p>
 
       <section>