docs(README): update roadmap in README.md

Signed-off-by: Deep Panchal <deep302001@gmail.com>

README.md

@@ -188,7 +188,7 @@ cargo test
  - [x] Read pages content from dnote cli into tui
  - [x] Show truncated pages content beside page id in pages section
  - [ ] Write Operations
- - [ ] Create a new book with page [#19](https://github.com/deepanchal/dnote-tui/issues/19)
+ - [x] Create a new book with page [#19](https://github.com/deepanchal/dnote-tui/issues/19)
  - [x] Edit a page's content [#37](https://github.com/deepanchal/dnote-tui/issues/37)
  - [x] Add new page to a book [#49](https://github.com/deepanchal/dnote-tui/issues/49)
  - [ ] Move page to another book [#60](https://github.com/deepanchal/dnote-tui/issues/60)