docs: update template documentation

Signed-off-by: Simon Brugman <sfbbrugman@gmail.com>

kedro-airflow/README.md

@@ -56,30 +56,43 @@ You can use the additional command line argument `--jinja-file` (alias `-j`) to
 kedro airflow create --jinja-file=./custom/template.j2
 ```
 
+Similarly, the included DAG `kwargs` template can be custom provided:
+
+```bash
+kedro airflow create --kwargs-template=./custom/kwargs_template.j2
+```
+
 #### How can I pass arguments to the Airflow DAGs dynamically?
 
 `kedro-airflow` picks up configuration from `airflow.yml` files. Arguments can be specified globally, or per pipeline:
 
 ```yaml
-# Example of global arguments for Airflow DAGs
-kwargs: |
-    start_date=datetime(2023, 1, 1),
-    max_active_runs=3,
+# Global parameters
+default:
+    start_date: [2023, 1, 1]
+    max_active_runs: 3
     # https://airflow.apache.org/docs/stable/scheduler.html#dag-runs
-    schedule_interval="@once",
-    catchup=False,
+    schedule_interval: "@once"
+    catchup: false
     # Default settings applied to all tasks
-    default_args=dict(
-        owner="airflow",
-        depends_on_past=False,
-        email_on_failure=False,
-        email_on_retry=False,
-        retries=1,
-        retry_delay=timedelta(minutes=5)
-    ),
-
-# Example configuration per pipeline (overrides `kwargs` from above)
+    default_args:
+        owner: "airflow"
+        depends_on_past: false
+        email_on_failure: false
+        email_on_retry: false
+        retries: 1
+        retry_delay: 5
+
+# Arguments specific to the pipeline (overrides the parameters above)
 data_science:
-    kwargs: |
-        schedule_interval="@once",
+    default_args:
+        owner: "airflow-ds"
 ```
+
+Arguments can also be passed via `--params` in the command line:
+
+```bash
+kedro airflow create --params "schedule_interval='@weekly'"
+```
+
+These variables are passed to the Jinja2 template.