[16.0]Website Migration, in multilingual custom views

[dansanti]

When multilingual is activated , query result a json instead a txt

`
File "/opt/odoo/custom_addons/16.0/openupgrade/openupgrade_framework/odoo_patch/odoo/modules/migration.py", line 18, in migrate_module
MigrationManager.migrate_module._original_method(self, pkg, stage)
File "/opt/odoo/16.0/odoo/modules/migration.py", line 183, in migrate_module
migrate(self.cr, installed_version)
File "/opt/odoo/env/16.0/lib/python3.10/site-packages/openupgradelib/openupgrade.py", line 2280, in wrapped_function
func(
File "/opt/odoo/custom_addons/16.0/openupgrade/openupgrade_scripts/scripts/website/16.0.1.0/end-migration.py", line 81, in migrate
convert_custom_qweb_templates_bootstrap_4to5(env)
File "/opt/odoo/custom_addons/16.0/openupgrade/openupgrade_scripts/scripts/website/16.0.1.0/end-migration.py", line 26, in convert_custom_qweb_templates_bootstrap_4to5
_convert_field_bootstrap_4to5_sql(env.cr, "ir_ui_view", "arch_db", ids=view_ids)
File "/opt/odoo/env/16.0/lib/python3.10/site-packages/openupgradelib/openupgrade_160.py", line 403, in _convert_field_bootstrap_4to5_sql
cr.execute(
File "/opt/odoo/16.0/odoo/sql_db.py", line 315, in execute
res = self._obj.execute(query, params)

psycopg2.errors.InvalidTextRepresentation:
LINE 1: UPDATE "ir_ui_view" SET "arch_db" = '{''en_US'': ''<?xml ver
`

To Reproduce

Steps to reproduce the behavior:

1. active 2 or more language
2. edit website front
3. try migration