[FIX] Add px-odoo as a merge source

Author: ljmnoonan

odoo/custom/src/repos.yaml

@@ -14,6 +14,7 @@
   merges:
     - ocb $ODOO_VERSION
     - odoo $ODOO_VERSION
+    - px-odoo $ODOO_VERSION
     - px-odoo 19.0-mail_disable_relay_notification
     - px-odoo 19.0-web-bring-back-print-button