Add resources for rust (#6109)

* Update 109-hashset.md

More links were added

* Update src/data/roadmaps/rust/content/101-language-basics/103-data-structures/109-hashset.md

---------

Co-authored-by: Kamran Ahmed <kamranahmed.se@gmail.com>

src/data/roadmaps/rust/content/101-language-basics/103-data-structures/109-hashset.md

@@ -4,4 +4,6 @@
 
 Learn more from the following links:
 
+- [@official@HashSet in std::collections - Rust](https://doc.rust-lang.org/std/collections/struct.HashSet.html)
 - [@article@Hashset](https://doc.rust-lang.org/rust-by-example/std/hash/hashset.html)
+- [@video@Rust HashSet Collection Type](https://www.youtube.com/watch?v=KYw3Lnf0nSY&t=1440s)