[IMP] mail: rename action menu 'Send Email' by 'Send email'

Rename the action menu 'Send Email' by 'Send email' for the
'res.partner' model.

Linked to task 1984526
Related to PR #33720

addons/mail/views/res_partner_views.xml

@@ -101,7 +101,7 @@
         </record>
 
         <!--  Replace the default mass-mailing wizard in base with the composition wizard -->
-        <act_window name="Send Email"
+        <act_window name="Send email"
                 res_model="mail.compose.message"
                 binding_model="res.partner"
                 binding_views="list"