📝 Update includes in `docs/en/docs/advanced/sub-applications.md` (#12806)

docs/en/docs/advanced/sub-applications.md

@@ -10,9 +10,7 @@ If you need to have two independent FastAPI applications, with their own indepen
 
 First, create the main, top-level, **FastAPI** application, and its *path operations*:
 
-```Python hl_lines="3  6-8"
-{!../../docs_src/sub_applications/tutorial001.py!}
-```
+{* ../../docs_src/sub_applications/tutorial001.py hl[3, 6:8] *}
 
 ### Sub-application
 
@@ -20,9 +18,7 @@ Then, create your sub-application, and its *path operations*.
 
 This sub-application is just another standard FastAPI application, but this is the one that will be "mounted":
 
-```Python hl_lines="11  14-16"
-{!../../docs_src/sub_applications/tutorial001.py!}
-```
+{* ../../docs_src/sub_applications/tutorial001.py hl[11, 14:16] *}
 
 ### Mount the sub-application
 
@@ -30,9 +26,7 @@ In your top-level application, `app`, mount the sub-application, `subapi`.
 
 In this case, it will be mounted at the path `/subapi`:
 
-```Python hl_lines="11  19"
-{!../../docs_src/sub_applications/tutorial001.py!}
-```
+{* ../../docs_src/sub_applications/tutorial001.py hl[11, 19] *}
 
 ### Check the automatic API docs