[7.13] [DOCS] Fix broken Canvas link (elastic#203852) (elastic#203877)

# Backport

This will backport the following commits from `8.8` to `7.13`:
- [[DOCS] Fix broken Canvas link
(elastic#203852)](elastic#203852)

<!--- Backport version: 8.9.8 -->

### Questions ?
Please refer to the [Backport tool
documentation](https://github.com/sqren/backport)

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Fix broken Canvas link
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Fix broken Canvas link
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BACKPORT-->

Author: lcawl

src/plugins/expressions/README.asciidoc

@@ -52,4 +52,4 @@ https://github.com/elastic/kibana/blob/master/docs/development/plugins/expressio
 
 
 ==== Other documentation
-https://www.elastic.co/guide/en/kibana/current/canvas-function-arguments.html[See Canvas documentation about expressions]
+<<canvas-function-arguments,See Canvas documentation about expressions>>