minor #9772 Correct typo on best practices (kaybie3)

This PR was merged into the 4.0 branch.

Discussion
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Correct typo on best practices

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Commits
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684e692 Correct typo on best practices

Author: javiereguiluz

bundles/best_practices.rst

@@ -239,7 +239,7 @@ of Symfony and the latest beta release:
         # it helps with testing legacy code and deprecations (composer require symfony/phpunit-bridge)
         - ./vendor/bin/simple-phpunit $PHPUNIT_FLAGS
 
-Consider using `Travis cron`_ too to make sure your project is built even if
+Consider using the `Travis cron`_ tool to make sure your project is built even if
 there are no new pull requests or commits.
 
 Installation