Migration script formatting in CHANGELOG.md for minor versions

[JulienLach]

Hello,

Formatting the minor version migration scripts in the changelog.md would be greatly appreciated. It would make it easier to read and reduce errors.

Current :

-- 2. Backfill supplier invoices (operation_type_select IN (1, 2)) -- from AccountingSituation of the invoice's partner UPDATE account_invoice inv SET vat_system_select = sit.vat_system_select FROM account_accounting_situation sit WHERE sit.partner = inv.partner AND sit.company = inv.company AND sit.vat_system_select IN (1, 2) AND inv.operation_type_select IN (1, 2) AND inv.status_select IN (1, 2, 3) AND inv.vat_system_select IS NULL;

Excpected :

-- 2. Backfill supplier invoices (operation_type_select IN (1, 2)) -- from AccountingSituation of the invoice's partner

UPDATE account_invoice inv SET vat_system_select = sit.vat_system_select FROM account_accounting_situation sit 
WHERE sit.partner = inv.partner AND sit.company = inv.company AND sit.vat_system_select IN (1, 2) 
AND inv.operation_type_select IN (1, 2) AND inv.status_select IN (1, 2, 3) AND inv.vat_system_select IS NULL;