fix: adjust package to get in line with dbt hub

Author: SpaceshipEnterprise

README.md

@@ -21,7 +21,7 @@ Data-diff solution for dbt-ers with Snowflake ❄️ 🚀
 
 ```yml
 packages:
-  - package: infinitelambda/dbt-data-diff
+  - package: infinitelambda/data_diff
     version: [">=1.0.0", "<1.1.0"]
 ```
 

docs/index.md

@@ -42,7 +42,7 @@ Sample DAG:
 
 ```yml
 packages:
-  - package: infinitelambda/dbt-data-diff
+  - package: infinitelambda/data_diff
     version: [">=1.0.0", "<1.1.0"]
 ```