[BUG] Does not regenerate docs on changes

[pronebird]

Describe the bug Doc viewer shows stale docs after changing the doc comments in the source code.

To Reproduce Steps to reproduce the behavior:

1. Add a piece of code and document it with ///
2. Cmd+shift+p then select Rust doc: viewer
3. Go back to source code and remove the /// comment made in the step 1
4. Cmd+shift+p then select Rust doc: viewer

Expected behavior Expected to see new docs but I see old ones.

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Additional context Add any other context about the problem here.