docs: update README.md status

The 'Popover' task has been updated to be marked as complete in the README.md file. The 'Hover' task has been removed. These changes reflect updates on the project's progress.

README.md

@@ -34,12 +34,11 @@ Meet our [web documentation](https://ui.psw.kr)!
   - [x] Dialog
   - [ ] Drawer
   - [ ] Dropdown Menu
-  - [ ] Hover
   - [ ] Label
   - [ ] Menubar
   - [ ] Navigation Menu
   - [ ] Pagination
-  - [ ] Popover
+  - [x] Popover
   - [ ] Progress
   - [ ] Radio Group
   - [ ] Scroll Area