Use Path.suffix(), don't cast doc2path to str

Author: agriyakhetarpal

jupyterlite_sphinx/jupyterlite_sphinx.py

@@ -609,8 +609,8 @@ def run(self):
 
 
 def _process_docstring_examples(app: Sphinx, docname: str, source: List[str]) -> None:
-    source_path: str = str(app.env.doc2path(docname))
-    if source_path.endswith(".py"):
+    source_path: str = app.env.doc2path(docname)
+    if source_path.suffix == ".py":
         source[0] = insert_try_examples_directive(source[0])