[FIX] calendar: wrong timezone in sms template

Issue :
- When sending an sms reminder by cron user, `_get_display_time` is
used which always uses Odoobot (cron user) timezone regardless of the
partner timezone

Fix:
- use `partner_id.tz` instead of Odoobot

OPW-2991624

closes odoo/odoo#105243

X-original-commit: 23d39f6de7ee656773f3e8f2515adfefc137c866
Signed-off-by: Mohamed Megahed Abbas Megahed SALLAM (mome) <mome@odoo.com>

addons/calendar_sms/data/sms_data.xml

@@ -4,7 +4,7 @@
         <record id="sms_template_data_calendar_reminder" model="sms.template">
             <field name="name">Calendar Event: Reminder</field>
             <field name="model_id" ref="calendar.model_calendar_event"/>
-            <field name="body">Event reminder: {{ object.name }}, {{ object.display_time }}</field>
+            <field name="body">Event reminder: {{ object.name }}, {{ object.get_display_time_tz(object.partner_id.tz) }}</field>
         </record>
     </data>
 </odoo>