WVS: new filename needed

[briatte]

This filename:

https://github.com/ajdamico/asdfree/blob/2459f0d76bc5c07edb3a180a538df70a370f36bd/64-wvs.Rmd#L50-L54

should now be:

wvs_df <-
	readRDS( 
		file.path( path.expand( "~" ) , "WVS" , 
			"wave 6/F00007569-WV6_Data_United_States_2011_Spss_v20180912.rds" ) 
	)

I'd submit a pull request, but I have an old version of the repo on my GitHub profile which I want to keep as such… sorry!