📚 Minor typo in cross-referencing.md (#990)

Co-authored-by: Chris Sewell <[email protected]>

docs/syntax/cross-referencing.md

@@ -338,7 +338,7 @@ you can then reference inventory objects by prefixing the `inv` schema to the de
 
 `key`, `domain` and `type` are optional, e.g. for `inv:#name`, all inventories, domains and types will be searched, with a [warning emitted](myst-warnings) if multiple matches are found.
 
-Additionally, `*` is a wildcard which matches zero or characters, e.g. `inv:*:std:doc#a*` will match all `std:doc` objects in all inventories, with a `name` beginning with `a`.
+Additionally, `*` is a wildcard which matches zero or more characters, e.g. `inv:*:std:doc#a*` will match all `std:doc` objects in all inventories, with a `name` beginning with `a`.
 Note, to match to a literal `*` use `\*`.
 
 Here are some examples: