Post function "Send Email" doesn't work properly when you use mappings and html in the body of the email

Title: Post function "Send Email" doesn't work properly when you use mappings and HTML in the body of the email

Short Description: If you create a post-function with the action "Send Email" and in the body, you use HTML and mappings, the HTML is not being resolved correctly when you receive the email in your email account

Test steps to reproduce:

1.Create a post function with the action "Send email" and in the body use the following code:

<p>Bonjour ${Prénom},</p>
<p>Tu trouveras en pièce jointe l'attestation de déplacement.</p>
<p>Bonne journée.</p>
<p>Syndex-Jira</p>
<p><span style="background-color:#ffffff; color:#333333; font-family:Arial; font-size:13.3333px">________________________</span>
<br />
<br />
<br />
<span style="font-size:12px"><em>Ce message se génère automatiquement, merci de ne pas y répondre en utilisant la fonction "répondre à l'expéditeur" de votre outil de messagerie.</em></span><br />
</p>

2. Execute post-function

Actual Result: When you receive the email, the HTML used in the post-function is not being resolved correctly.

Note: if you remove the mapping from the body, the HTML is being resolved correctly

Expected Result: HTML must be resolved correctly even if the user uses mappings in the body of the email. Example of the expected result: