minor #2980 [LiveComponent][Docs] Fix typo on Valid constraint name (Seb33300)

This PR was merged into the 2.x branch.

Discussion
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[LiveComponent][Docs] Fix typo on `Valid` constraint name

| Q             | A
| ------------- | ---
| Bug fix?      | no
| New feature?  | no <!-- please update src/**/CHANGELOG.md files -->
| Docs?         | yes <!-- required for new features -->
| Issues        | Fix #... <!-- prefix each issue number with "Fix #", no need to create an issue if none exist, explain below instead -->
| License       | MIT

Related to #2974

Commits
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00d25be [Doc] Fix Valid constraint name

Author: Kocal

src/LiveComponent/doc/index.rst

@@ -2256,7 +2256,7 @@ need::
         public bool $agreeToTerms = false;
     }
 
-Be sure to add the ``IsValid`` attribute/annotation to any property
+Be sure to add the ``Valid`` attribute/annotation to any property
 where you want the object on that property to also be validated.
 
 Thanks to this setup, the component will now be automatically validated