Tweak warning wording (#353)

Thanks to James Spirit for the suggestion.

Author: frankieroberto

app/views/record-vaccinations/patient-history.html

@@ -92,7 +92,7 @@ <h2 class="nhsuk-heading-m">Vaccination history</h2>
 
       {{ warningCallout({
         heading: "Important",
-        html: "<p>Some RSV vaccination records entered by GPs are incorrect and the patient may not yet have had their vaccination.</p><p>Check with the patient or their GP.</p>"
+        html: "<p>Some RSV vaccination records entered into GP systems are incorrect and the patient may not yet have had their vaccination.</p><p>Check with the patient or their GP.</p>"
       }) }}
     </div>
   </div>