Skip checking GitHub in linkcheck #1553
Description
linkcheck failed because GitHub rate limits us and then the workflow times out.
-rate limited- https://github.com/python/cpython/blob/main/Doc/README.rst | sleeping...
-rate limited- https://github.com/python/cpython/blob/main/Doc/Makefile | sleeping...
-rate limited- https://github.com/python/cpython/blob/main/Grammar | sleeping...
-rate limited- https://github.com/python/cpython/blob/main/Doc/tools/extensions/c_annotations.py | sleeping...
Error: The operation was canceled.
Shall we skip checking GitHub in linkcheck?
Originally posted by @hugovk in #1552 (comment)