Regarding visiblity of Check for broken links in the documentation

[Aman Kumar Shukla]

I was working on this Issue whereby as one of the measures I fixed a lot of broken links

 issues from the documentation. After that, I thought it would be good if I could improve the

 visibility of broken links by adding a GitHub workflow action test routine using 'make linkcheck' 

command. So, I created this PR and I want some feedback as to how it could be

 improved and whether there is a need for this PR.