docs(validation): snippets split, improved, and lint (#1449)

Co-authored-by: Release bot <aws-devax-open-source@amazon.com>
Co-authored-by: Peter Schutt <peter@schutt.io>
Co-authored-by: heitorlessa <lessa@amazon.co.uk>
Co-authored-by: Rúben Fonseca <fonseka@gmail.com>

Author: 5 people

docs/utilities/jmespath_functions.md

@@ -134,7 +134,7 @@ This sample will decode the base64 value within the `data` key, and deserialize
 
 === "powertools_base64_jmespath_function.py"
 
-    ```python hl_lines="7 10 37 48 52 54 56"
+    ```python hl_lines="7 10 37 49 53 55 57"
     --8<-- "examples/jmespath_functions/src/powertools_base64_jmespath_function.py"
     ```