minor #43474 [Validator] Update validators.bs.xlf (juricav, Jurica Vlahoviček)

This PR was squashed before being merged into the 4.4 branch.

Discussion
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[Validator] Update validators.bs.xlf

| Q             | A
| ------------- | ---
| Branch?       | 4.4
| Bug fix?      | no
| New feature?  | no <!-- please update src/**/CHANGELOG.md files -->
| Deprecations? | no <!-- please update UPGRADE-*.md and src/**/CHANGELOG.md files -->
| Tickets       | Fix #43420 <!-- prefix each issue number with "Fix #", no need to create an issue if none exist, explain below instead -->
| License       | MIT
| Doc PR        | symfony/symfony-docs#... <!-- required for new features -->

Add missing translation.

Commits
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61c5bfe702 [Validator] Update validators.bs.xlf

Author: fabpot

Resources/translations/validators.bs.xlf

@@ -16,7 +16,7 @@
             </trans-unit>
             <trans-unit id="99">
                 <source>This value is not a valid HTML5 color.</source>
-                <target>Ova vrijednost nije ispravna HTML5 boja.</target>
+                <target>Ova vrijednost nije važeća HTML5 boja.</target>
             </trans-unit>
             <trans-unit id="100">
                 <source>Please enter a valid birthdate.</source>