minor symfony#48406 [Notifier] Fix markdown (OskarStark)

This PR was merged into the 6.1 branch.

Discussion
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[Notifier] Fix markdown

| Q             | A
| ------------- | ---
| Branch?       | 6.1
| Bug fix?      | no
| New feature?  | no
| Deprecations? | no
| Tickets       | -
| License       | MIT
| Doc PR        | -

Commits
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41b0d94 [Notifier] Fix markdown

Author: OskarStark

src/Symfony/Component/Notifier/Bridge/Sendberry/README.md

@@ -19,7 +19,7 @@ where:
 Resources
 ---------
 
-  * [Contributing](https://symfony.com/doc/current/contributing/index.html)
-  * [Report issues](https://github.com/symfony/symfony/issues) and
-    [send Pull Requests](https://github.com/symfony/symfony/pulls)
-    in the [main Symfony repository](https://github.com/symfony/symfony)
+ * [Contributing](https://symfony.com/doc/current/contributing/index.html)
+ * [Report issues](https://github.com/symfony/symfony/issues) and
+   [send Pull Requests](https://github.com/symfony/symfony/pulls)
+   in the [main Symfony repository](https://github.com/symfony/symfony)