Exclude some links from the link checker (#54235)

Author: isaacmbrown

src/links/lib/excluded-links.yml

@@ -83,3 +83,5 @@
 - startsWith: https://www.ilo.org
 - is: https://www.codeproject.com/Articles/1214409/Learn-YAML-in-five-minutes
 - is: https://learning.getpostman.com/docs/postman/sending_api_requests/graphql/
+- is: https://www.nongnu.org/oath-toolkit/man-oathtool.html
+- is: https://www.gnu.org/software/emacs/