CRAN URL not in canonical form

[Matti Vuorre]

Hi,

Currently, the badge URL gives a NOTE on winbuilder. For example, when using winbuilder on package bmlm:

Found the following (possibly) invalid URLs:
  URL: http://cran.rstudio.com/web/packages/bmlm/index.html (moved to https://cran.rstudio.com/web/packages/bmlm/index.html)
    From: README.md
    Status: 200
    Message: OK
    CRAN URL not in canonical form

The badge links should probably be in the "canonical CRAN form", e.g.:

https://cran.r-project.org/package=bmlm

[Gábor Csárdi]

Thanks! Do you want to submit a PR?

[Matti Vuorre]

Sorry, I don't think I'd know how to fix it.