Investigate errors from gif-generation.ipynb

There are at least 2 issues in https://github.com/NASA-IMPACT/veda-docs/blob/ab/gif-gen-errors/notebooks/tutorials/gif-generation.ipynb to address.

1. Similar to https://github.com/NASA-IMPACT/veda-docs/pull/118, the no2-monthly dataset is missing cog_default from summaries so in that PR and in this version of the gif-generation notebook I use the item's assets
2. With ⬆️ we can proceed but there is an issue emanating from the webdriver_manager package when it drives to look up a browser version.

I also found that this instruction from the pypi homepage

# selenium 4
from selenium import webdriver
from selenium.webdriver.chrome.service import Service as ChromeService
from webdriver_manager.chrome import ChromeDriverManager

driver = webdriver.Chrome(service=ChromeService(ChromeDriverManager().install()))

throws the same error (I was hoping it might fix it)

Start with notebooks/tutorials/gif-generation.ipynb and compare the handling of the no2-monthly dataset with pull request 118. Reproduce the webdriver_manager error using the Selenium example shown in the issue. Done means the missing cog_default handling and browser-driver error are addressed and the notebook runs successfully.