UniqueDeque and RigidDeque links in README leads to non-existent files

The documentation for `UniqueDeque` and `RigidDeque` is missing from the `Deque Module`. Clicking the documentation links in the README file leads to non-existent files. ### Information - **Package version:** 1.4.0 ### Steps to Reproduce Click the `UniqueDeque` or `RigidDeque` link in the README under the `DequeModule module`. ### Expected behavior Links should navigate to the corresponding documentation. ### Actual behavior 404 errors occur.