Update GA4 code for GA (#338)

Author: mmcky

lectures/_config.yml

@@ -62,7 +62,7 @@ sphinx:
       description: This website presents introductory lectures on computational economics, designed and written by Thomas J. Sargent and John Stachurski.
       keywords: Python, QuantEcon, Quantitative Economics, Economics, Sloan, Alfred P. Sloan Foundation, Tom J. Sargent, John Stachurski
       analytics:
-        google_analytics_id: G-1P39P53YM9
+        google_analytics_id: G-QDS1YRJNGM
       launch_buttons:
         notebook_interface        : classic  # The interface interactive links will activate ["classic", "jupyterlab"]
         binderhub_url             : https://mybinder.org  # The URL of the BinderHub (e.g., https://mybinder.org)