minor symfony#7965 fix broken hash value of link (robertfausk, javiereguiluz)

This PR was merged into the 2.8 branch.

Discussion
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fix broken hash value of link

E.g. change http://symfony.com/doc/2.8/components/dependency_injection/compilation.html#components-di-separate-compiler-passes to
http://symfony.com/doc/2.8/components/dependency_injection/compilation.html#creating-separate-compiler-passes

Affects all upstream versions up to 3.3/3.4

Commits
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540b3f0 Fixed a wrong reference
cdcce28 fix broken hash value of link

Author: javiereguiluz

service_container/compiler_passes.rst

@@ -8,7 +8,7 @@ How to Work with Compiler Passes in Bundles
 Compiler passes give you an opportunity to manipulate other service
 definitions that have been registered with the service container. You
 can read about how to create them in the components section
-":ref:`components-di-compiler-pass`".
+":ref:`components-di-separate-compiler-passes`".
 
 When using :ref:`separate compiler passes <components-di-separate-compiler-passes>`,
 you need to register them in the ``build()`` method of the bundle class (this