fix: use model instead of name

[ecarreras]

This pull request makes a small but important fix to the query used in the change_column_type function in oopgrade/oopgrade.py. The change ensures that the query checks the correct column in the ir_model table.

• Updated the SQL query in change_column_type to check the model column instead of the name column in ir_model, ensuring accurate existence checks for models.

[Copilot]

Pull request overview

This pull request fixes a bug in the change_column_type function where the SQL query was checking the wrong column in the ir_model table. The function is used to alter column types in database tables, and before making changes, it needs to check if any views depend on the table being modified. When checking if a model exists in the ir_model table, the code was incorrectly querying the name column instead of the model column.

Changes:

• Fixed SQL query in change_column_type to check the model column (not name) when verifying model existence in ir_model table

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