Update wordings as per PR feedback

Co-authored-by: Darin Kotter <[email protected]>

includes/admin/templates/create-account-page.php

@@ -241,7 +241,7 @@
 						echo wp_kses(
 							sprintf(
 								/* translators: %s - Mailchimp legal pages */
-								__( 'By clicking the "Get Started!" button, you are creating a Mailchimp account, and you agree to Mailchimp\'s <a href=%1$s target=_blank>Terms of Use</a> and <a href=%2$s target=_blank>Privacy Policy</a>.', 'mailchimp' ),
+								__( 'By clicking the "Activate Account" button, you are creating a Mailchimp account, and you agree to Mailchimp\'s <a href=%1$s target=_blank>Terms of Use</a> and <a href=%2$s target=_blank>Privacy Policy</a>.', 'mailchimp' ),
 								esc_url( 'https://mailchimp.com/legal/terms' ),
 								esc_url( 'https://mailchimp.com/legal/privacy' )
 							),

includes/admin/templates/login.php

@@ -13,7 +13,7 @@
 			<div class="title"><?php esc_html_e( 'Let\'s connect your Mailchimp account', 'mailchimp' ); ?></div>
 			<p class="h4">
 				<?php
-				esc_html_e( 'Log in to your Mailchimp account to install the app or create a new account to authorize and connect to WordPress. Setup should take just a few minutes.', 'mailchimp' );
+				esc_html_e( 'Log in to your existing Mailchimp account or create a new account to authorize and connect to WordPress. Setup should take just a few minutes.', 'mailchimp' );
 				?>
 			</p>