Update read-one.md

Author: Nimitha-jagadeesha

docs/tutorial/fastapi/read-one.md

@@ -12,7 +12,7 @@ We want to get the hero based on the `id`, so we will use a **path parameter** `
 
 If you need to refresh how *path parameters* work, including their data validation, check the <a href="https://fastapi.tiangolo.com/tutorial/path-params/" class="external-link" target="_blank">FastAPI docs about Path Parameters</a>.
 
-{* ./docs_src/tutorial/fastapi/read_one/tutorial001_py310.py ln[1:2] hl=[6] *}
+{* ./docs_src/tutorial/fastapi/read_one/tutorial001_py310.py ln[1:2] hl[6] *}
 
 {* ./docs_src/tutorial/fastapi/read_one/tutorial001_py310.py ln[59:65] *}