stlink: add extra clarification on descriptions
stlink: add extra clarification on descriptions

deekim/tldr,katekyan/tldr,cptdeka10/tldr,Phizho/tldr,UncommonPleb/tldr,katekyan/tldr,felixonmars/tldr,cptdeka10/tldr,slash3b/tldr,deekim/tldr,zoisom/tldr,cptdeka10/tldr,zoisom/tldr,slash3b/tldr,UncommonPleb/tldr,deekim/tldr,Phizho/tldr,zoisom/tldr,UncommonPleb/tldr,katekyan/tldr,Phizho/tldr,slash3b/tldr,felixonmars/tldr,felixonmars/tldr