fix old class_name typos

Author: rmorshea

docs/examples.py

@@ -122,7 +122,7 @@ def Wrapper():
     def PrintView():
         text, set_text = idom.hooks.use_state(print_buffer.getvalue())
         print_buffer.set_callback(set_text)
-        return idom.html.pre(text, class_="printout") if text else idom.html.div()
+        return idom.html.pre(text, class_name="printout") if text else idom.html.div()
 
     return Wrapper()
 

docs/source/reference/_examples/simple_dashboard.py

@@ -86,7 +86,7 @@ def update_value(value):
         idom.html.legend(label, style={"font_size": "medium"}),
         Input(update_value, "number", value, attributes=attrs, cast=float),
         Input(update_value, "range", value, attributes=attrs, cast=float),
-        class_="number-input-container",
+        class_name="number-input-container",
     )