fix typo

Author: sebastianMindee

lib/mindee/http/mindee_api_v2.rb

@@ -122,7 +122,7 @@ def enqueue_form_options(form_data, params)
         form_data.push(['confidence', params.confidence.to_s]) unless params.confidence.nil?
         form_data.push ['file_alias', params.file_alias] if params.file_alias
         form_data.push ['text_context', params.text_context] if params.text_context
-        form_data.push ['data_schema', params.data_schema.to_s] if params.text_context
+        form_data.push ['data_schema', params.data_schema.to_s] if params.data_schema
         unless params.webhook_ids.nil? || params.webhook_ids.empty?
           form_data.push ['webhook_ids', params.webhook_ids.join(',')]
         end