'Context has no dynamic value while sending email with send_mail() in django

I am trying to send mail with dynamic valued templates in django, But the parameter context sends nothing to the template

tasks.py

def send_verification_mail(username,mail):
    msg_html = render_to_string('templates/email.html',  
    {'context':"value","context2":"value2"})
    html=strip_tags(msg_html)
    send_mail(
        'From online store',
        'Welcome '+username,
        '[email protected]',
        [mail],
        html_message=html,
        fail_silently=False,
    )

email_template.html

<html>
    <body>To verify click below<br>
        <button> Verify your account</button>
{{context}} {{context2}}
    </body>
</html>


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