minor #19578 Fix wording of code example blurb in lazy_services.rst (adrolter)

This PR was submitted for the 7.0 branch but it was merged into the 6.4 branch instead.

Discussion
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Fix wording of code example blurb in lazy_services.rst

The code example shows how one member of a union type, and not an intersection type as stated, can be targeted with `#[Autowire(lazy: ...)]`.

Commits
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2013117 Update lazy_services.rst

Author: javiereguiluz

service_container/lazy_services.rst

@@ -121,7 +121,7 @@ You can also configure laziness when your service is injected with the
     }
 
 This attribute also allows you to define the interfaces to proxy when using
-laziness, and supports lazy-autowiring of intersection types::
+laziness, and supports lazy-autowiring of union types::
 
     public function __construct(
         #[Autowire(service: 'foo', lazy: FooInterface::class)]