Update README.md (apache#9572)

Fix path to catalog.rs

datafusion-examples/README.md

@@ -45,7 +45,7 @@ cargo run --example csv_sql
 - [`avro_sql.rs`](examples/avro_sql.rs): Build and run a query plan from a SQL statement against a local AVRO file
 - [`csv_sql.rs`](examples/csv_sql.rs): Build and run a query plan from a SQL statement against a local CSV file
 - [`csv_sql_streaming.rs`](examples/csv_sql_streaming.rs): Build and run a streaming query plan from a SQL statement against a local CSV file
-- [`catalog.rs`](examples/external_dependency/catalog.rs): Register the table into a custom catalog
+- [`catalog.rs`](examples/catalog.rs): Register the table into a custom catalog
 - [`custom_datasource.rs`](examples/custom_datasource.rs): Run queries against a custom datasource (TableProvider)
 - [`dataframe.rs`](examples/dataframe.rs): Run a query using a DataFrame against a local parquet file
 - [`dataframe-to-s3.rs`](examples/external_dependency/dataframe-to-s3.rs): Run a query using a DataFrame against a parquet file from s3 and writing back to s3