Fix typo in geom-count.R (#6586)

* Update geom-count.R - add missing "of" to descrip on L 6

* document

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Co-authored-by: Teun van den Brand <[email protected]>

Author: sashahafner

R/geom-count.R

@@ -3,7 +3,7 @@ NULL
 
 #' Count overlapping points
 #'
-#' This is a variant [geom_point()] that counts the number of
+#' This is a variant of [geom_point()] that counts the number of
 #' observations at each location, then maps the count to point area. It
 #' useful when you have discrete data and overplotting.
 #'