have footer on emails (#11300)

# ISSUE 

- Closes #9622

---------

Co-authored-by: Félix Malfait <felix@twenty.com>

packages/twenty-emails/src/components/Title.tsx

@@ -1,10 +1,9 @@
-import { ReactNode } from 'react';
 import { Heading } from '@react-email/components';
 
 import { emailTheme } from 'src/common-style';
 
 type TitleProps = {
-  value: ReactNode;
+  value: JSX.Element | JSX.Element[] | string;
 };
 
 const titleStyle = {