release.sh in terraform-examples-UI branch

Release.sh currently has some issues:

- When its executed, it gives a warning about usage of depth argument of find. Script output lists directories when that argument is changed to maxdepth and placed before type argument.
- After the change mentioned above, it shows warning about different directories. According to RELEASE.md in main branch, comment for release.sh is `To get advice on whether an examples folder needs to be added, and add if necessary`. So we should expect it to list provider folders inside examples folder which doesn't have related md files.

This script should be fixed and its usage should be documented.