fix outdated syntax for failure example

Author: noahbaculi

advocacy_docs/edb-postgres-ai/ai-accelerator/preparers/examples/summarize_text.mdx

@@ -67,12 +67,15 @@ The AI accelerator data preparation pipeline validates the options at creation t
 
 ```sql
 -- This model does not support the language adapter
-SELECT aidb.create_model('bert_model__1952', 'bert_local');
+SELECT aidb.create_model('bert_model', 'bert_local');
 ```
 
 ```sql
 -- Single execution fails
-SELECT * FROM aidb.summarize_text('bert_model__1952', 'Hello world');
+SELECT * FROM aidb.summarize_text(
+    input => 'Hello world',
+    options => '{"model": "bert_model"}'
+);
 __OUTPUT__
 ERROR:  The requested adapter is not supported by the model provider: bert_local
 ```
@@ -86,7 +89,7 @@ SELECT aidb.create_table_preparer(
     source_data_column => 'content',
     destination_table => 'summarized_data__1952',
     destination_data_column => 'summaries',
-    options => '{"model": "bert_model__1952"}'::JSONB  -- Incompatible model
+    options => '{"model": "bert_model"}'::JSONB  -- Incompatible model
 );
 __OUTPUT__
 ERROR:  Failed to create preparer: The requested adapter is not supported by the model provider: bert_local