Fix px.histogram docstring typo

tranformed -> transformed

Author: willfrey

Diff for: packages/python/plotly/plotly/express/_doc.py

@@ -18,7 +18,7 @@
     data_frame=[
         "DataFrame or array-like or dict",
         "This argument needs to be passed for column names (and not keyword names) to be used.",
-        "Array-like and dict are tranformed internally to a pandas DataFrame.",
+        "Array-like and dict are transformed internally to a pandas DataFrame.",
         "Optional: if missing, a DataFrame gets constructed under the hood using the other arguments.",
     ],
     x=[