Updated Queue(Format) and Breadth First Traversal[JAVA] in README

[aryanargupta]

This issue is about README of [Queue] and Breadth First Traversal[JAVA]. There were multiple instances of Queue in the table which I have merged, as well as updated the check mark for the Breadth First traversal in JAVA recently added by satyacasm. Hence, I request to assign this issue to me so that I can send the PR and resolve the issues ASAP.

• [x] Issue Title is in form Algo/DS Name [Language].
• [x] I searched or browsed the repo’s other issues to ensure this is not a duplicate.
• [x] This Algo/DS is worth adding to this repository.
• [x] Assign this issue to me (I want to work on this).
  • [x] I ensure that I am not already assigned to 2 or more issues.
• [x] I will send my PR only after I'm assigned to this issue by any maintainer.
• [x] I understand that I will be unassigned from this issue if I fail to send a PR for this within a week.

[aryanargupta]

Also, added a correct link for Breadth First Traversal as the old link is probably not existing now.

[kalashshah]

GFI 👍