minor #9856 Update licence hint for JMS serializer (jdreesen)

This PR was merged into the master branch.

Discussion
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Update licence hint for JMS serializer

JMS serializer changed its license to MIT in `v1.12.0`

See:
- https://github.com/schmittjoh/serializer/releases
- schmittjoh/serializer#956
- schmittjoh/serializer#950

I'm not sure which branch this should PR should target.
Also, I'm unsure about the best wording, maybe you can guide me a bit?

Commits
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99d6e35 Update licence hint for JMS serializer

Author: javiereguiluz

components/serializer.rst

@@ -1245,7 +1245,7 @@ Learn more
 .. seealso::
 
     A popular alternative to the Symfony Serializer Component is the third-party
-    library, `JMS serializer`_ (released under the Apache license, so incompatible with GPLv2 projects).
+    library, `JMS serializer`_ (versions before `v1.12.0` were released under the Apache license, so incompatible with GPLv2 projects).
 
 .. _`PSR-1 standard`: https://www.php-fig.org/psr/psr-1/
 .. _`JMS serializer`: https://github.com/schmittjoh/serializer