minor #4495 [Best Practices][Business Logic] link to a bundle's curre…

…nt (not master) docs (xabbuh)

This PR was merged into the 2.3 branch.

Discussion
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[Best Practices][Business Logic] link to a bundle's current (not master) docs

| Q             | A
| ------------- | ---
| Doc fix?      | yes
| New docs?     | no
| Applies to    | all
| Fixed tickets |

Commits
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13f18b3 link to a bundle's current (not master) docs

best_practices/business-logic.rst

@@ -335,7 +335,7 @@ in a matter of seconds.
 
 .. _`full definition`: http://en.wikipedia.org/wiki/Business_logic
 .. _`Doctrine project`: http://www.doctrine-project.org/
-.. _`fixture class`: http://symfony.com/doc/master/bundles/DoctrineFixturesBundle/index.html#writing-simple-fixtures
+.. _`fixture class`: http://symfony.com/doc/current/bundles/DoctrineFixturesBundle/index.html#writing-simple-fixtures
 .. _`PSR-1`: http://www.php-fig.org/psr/psr-1/
 .. _`PSR-2`: http://www.php-fig.org/psr/psr-2/
 .. _`the Symfony Code Standards`: http://symfony.com/doc/current/contributing/code/standards.html