feat: ENG-2178: Update mobile field messaging (#374)

* Update copy

* Update tests

* feat: Amazon donation related mobile field updates

Author: AndyEPhipps

cypress/integration/submit_spec.js

@@ -37,9 +37,9 @@ describe('e2e test', () => {
     cy.get('#field-input--mobile').type('sdf').clear().click();
     cy.get('#field-error--mobile>span').should('contain','Please fill in your mobile number');
     cy.get('#field-input--mobile').type('sdf');
-    cy.get('#field-error--mobile>span').should('contain', 'Please enter a valid mobile phone number - it must be the same number that you used to make your donation.');
+    cy.get('#field-error--mobile>span').should('contain', 'Please enter a valid mobile phone number - it must be the same number associated with your donation.');
     cy.get('#field-input--mobile').clear().type(faker.phone.phoneNumber('02########'));
-    cy.get('#field-error--mobile>span').should('contain', 'Please enter a valid mobile phone number - it must be the same number that you used to make your donation.');
+    cy.get('#field-error--mobile>span').should('contain', 'Please enter a valid mobile phone number - it must be the same number associated with your donation.');
     cy.get('#field-input--mobile').clear().type(faker.phone.phoneNumber('07#########'));
     cy.get('#field-error--mobile>span').should('not.exist')
   });

src/pages/GiftAid/SubmitForm/SubmitFormFields.js

@@ -33,9 +33,9 @@ export const submitFormFields = {
     label: 'Mobile number',
     required: true,
     pattern: '^07[0-9]{9}$',
-    helpText: 'Enter the one you used for your text donation or called to donate on',
+    helpText: 'Enter the one associated with your donation',
     emptyFieldErrorText: 'Please fill in your mobile number',
-    invalidErrorText: 'Please enter a valid mobile phone number - it must be the same number that you used to make your donation.'
+    invalidErrorText: 'Please enter a valid mobile phone number - it must be the same number associated with your donation.'
   },
   firstName: {
     id: 'firstname',