minor #4544 bug #4273 - fix doctrine version in How to Provide Model Classes for several Doctrine Implementations cookbook (ternel)

This PR was merged into the 2.3 branch.

Discussion
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bug #4273 - fix doctrine version in How to Provide Model Classes for several Doctrine Implementations cookbook

| Q             | A
| ------------- | ---
| Doc fix?      | yes
| New docs?     | no
| Applies to    | 2.3+
| Fixed tickets | #4273

Commits
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6aabece bug #4273 - fix doctrine version in How to Provide Model Classes for several Doctrine Implementations cookbook

Author: wouterj

cookbook/doctrine/mapping_model_classes.rst

@@ -18,7 +18,7 @@ register the mappings for your model classes.
 
 .. versionadded:: 2.3
     The base mapping compiler pass was introduced in Symfony 2.3. The Doctrine bundles
-    support it from DoctrineBundle >= 1.2.1, MongoDBBundle >= 3.0.0,
+    support it from DoctrineBundle >= 1.3.0, MongoDBBundle >= 3.0.0,
     PHPCRBundle >= 1.0.0-alpha2 and the (unversioned) CouchDBBundle supports the
     compiler pass since the `CouchDB Mapping Compiler Pass pull request`_
     was merged.