Updated text on No search result screen (#236)

Changed the text to reinforce you should search several times before
continuing with no NHS number. And removed the text saying this record
is not sent to the GP as not sure that's 100% correct - if the record is
reconciled then presumably it would reach the GP.

Author: Anna-Sutton

app/views/vaccinate/no-search-result.html

@@ -110,7 +110,7 @@ <h1 class="nhsuk-heading-l">No result found</h1>
         }) }}
       </form>
 
-      <p>You can continue and record a vaccination without an NHS number, however the record will not be sent to a GP.</p>
+      <p>If you've tried searching several times and cannot find an existing patient record, you can continue and record a vaccination without an NHS number.</p>
 
       {{ button({
           text: "Continue with no NHS number",