Hi @Barshay,
I recreated your setting and I am able to deploy the json file in the changeset successfully. Please take a look at the below working changeset.
<changeSet id="table1" author="amalik" labels="4.1.1">
<createTable tableName="table1">
<column name="field_with_json_type" type="text"/>
</createTable>
</changeSet>
<changeSet id="forum1" author="aditi">
<insert tableName="table1">
<column name="field_with_json_type" valueClobFile="schemaBackup.json"/>
</insert>
</changeSet>