Log Message:
(devel/R-cli) Updated 3.6.1 to 3.6.2

# cli 3.6.2

* `ansi_collapse(x, trunc = 1, style = "head")` now indeed shows one
  element if `length(x) == 2`, as documented (@salim-b, #572).

* `ansi_collapse()` gains a `sep2` argument to specify a seperate separator
  for length-two inputs. It defaults to `" and "` which, in \ 
conjunction with
  the other defaults, produces a collapsed string that fully adheres to the
  [serial comma](https://en.wikipedia.org/wiki/Serial_comma) rules.
  (@salim-b, #569)

* `ansi_string()` is now an exported function (@multimeric, #573).