[Rd] small typo in internet.c

[Kevin Ushey]

Hello,

I spotted a small typo recently in R-devel:

$ rg "htto://"
src/modules/internet/internet.c
95:     warning(_("the 'wininet' method of url() is deprecated for
htto:// and https:// URLs"));

I suspect 'htto://' should read 'http://'.

Thanks,
Kevin