documentation - analysts guide: nloptr vignette link broken

[extrospective]

Broken link in documentation

Describe issue

Analysts guide says:

Robyn's budget allocator uses the gradient-based nloptr library to solve the nonlinear saturation function (Hill) analytically. For more details please check the [vignette](https://cran.r-project.org/web/packages/nloptr/vignettes/nloptr.pdf) of the nloptr library.

The link to nloptr.pdf does not work.

While I did find this: https://rdrr.io/cran/nloptr/f/vignettes/nloptr.Rmd, I have no idea if that is the intended link.

[laresbernardo]

Hi @extrospective
This was the intended documentation link: https://cran.r-project.org/web/packages/nloptr/nloptr.pdf
They must have changed it. Feel free to read more about nloptr in CRAN (here).
Thanks for reporting this. We'll get it fixed in the documentation soon.

[laresbernardo]

Doc updated. Thanks @extrospective