Update datatable-secondary-indices-and-auto-indexing.Rmd #7220 realignent

Author: ChristianWia

vignettes/fr/datatable-secondary-indices-and-auto-indexing.Rmd

@@ -11,7 +11,7 @@ vignette: >
 
 ```{r echo=FALSE, file='../_translation_links.R'}
 ```
-`r .write.translation.links("Translations of this document are available in: %s")`
+`r .write.translation.links("Une traduction de ce document est disponible en : %s")`
 
 ```{r, echo = FALSE, message = FALSE}
 require(data.table)