badges: bug introduced by cleaning?!

[mrustl]

Using a86bfaa has bugs if function use_index_rmd() or use_readme_md() are called (see for example https://raw.githubusercontent.com/KWB-R/kwb.vs2dh/343406e4629f32343b3e38bb468b248cbb1be2c7/README.md)

kwb.pkgbuild::use_badge_cran("kwb.vs2dh")`
[1] "[![CRAN_Status_Badge](https://www.r-pkg.org/badges/version/<pkgname>)]()"

Please fix the bug introduced by cleaning and add a test

[mrustl]

Still not completly solved see KWB-R/kwb.pathdict#2