doc: add at-ref for piping operator in punctuation.md (#43349)

Author: logankilpatrick

doc/src/base/punctuation.md

@@ -56,5 +56,5 @@ Extended documentation for mathematical symbols & functions is [here](@ref math-
 | [`===`](@ref) | triple equals sign is programmatically identical equality comparison                      |
 | [`=>`](@ref Pair) | right arrow using an equals sign defines a [`Pair`](@ref) typically used to populate [dictionaries](@ref Dictionaries) |
 | `->`        | right arrow using a hyphen defines an [anonymous function](@ref man-anonymous-functions) on a single line |
-| `\|>`        | pipe operator passes output from the left argument to input of the right argument, usually a [function](@ref Function-composition-and-piping) |
+| [`\|>`](@ref)       | pipe operator passes output from the left argument to input of the right argument, usually a [function](@ref Function-composition-and-piping) |
 | `∘`         | function composition operator (typed with \circ{tab}) combines two functions as though they are a single larger [function](@ref Function-composition-and-piping) |