Sorry in advance if I am asking a question that is too easy, I am a junior student who is trying to learn and run the tutorial you've post on Google Colab. Link: https://colab.research.google.com/drive/1efCKQtuHOlw7MLojIwqi2zrU2NZbG-FP#scrollTo=AxT2FTlMwxK4
Here is the module of code I am currently trying to run.
The url can't be retrieve and can't open directly in browser.

Data download

==============================================================================

url = ('https://raw.githubusercontent.com/JoaquinAmatRodrigo/skforecast/master/' +
'data/vic_elec.csv')
data = pd.read_csv(url, sep=',')
data.info()

Raise an error of URL not found.

HTTPError Traceback (most recent call last)
in <cell line: 0>()
2 # ==============================================================================
3 url = ('https://raw.githubusercontent.com/JoaquinAmatRodrigo/skforecast/master/data/vic_elec.csv')
----> 4 data = pd.read_csv(url, sep=',')
5 data.info()

12 frames
/usr/lib/python3.11/urllib/request.py in http_error_default(self, req, fp, code, msg, hdrs)
641 class HTTPDefaultErrorHandler(BaseHandler):
642 def http_error_default(self, req, fp, code, msg, hdrs):
--> 643 raise HTTPError(req.full_url, code, msg, hdrs, fp)
644
645 class HTTPRedirectHandler(BaseHandler):

HTTPError: HTTP Error 404: Not Found

I looked up the entire program and I think neither link1 nor link2 listed here can be opened, and link3 is still valid.
link1: https://raw.githubusercontent.com/JoaquinAmatRodrigo/skforecast/master/data/vic_elec.csv
link2: https://raw.githubusercontent.com/JoaquinAmatRodrigo/skforecast/master/data/h2o.csv
link3: https://raw.githubusercontent.com/tidyverts/tsibbledata/master/data-raw/vic_elec/VIC2015/demand.csv

Thanks a lot if any mistake can be pointed out!