Improve Behat test instructions

Readme.rst

@@ -184,14 +184,14 @@ we use the right versions etc).
 
    .. code-block:: bash
 
-       pushd Packages/Neos/Neos.ContentRepository.BehavioralTests/Tests/Behavior
+       bin/behat -c Packages/Neos/Neos.ContentRepository.BehavioralTests/Tests/Behavior/behat.yml.dist
 
-       ../../../../../bin/behat -c behat.yml.dist Features/
+Running all tests can take a long time, depending on the hardware.
+To speed up the process, Behat tests can be executed in a "synchronous" mode by setting the `CATCHUPTRIGGER_ENABLE_SYNCHRONOUS_OPTION` environment variable:
 
-       # To run tests in speed mode, run CATCHUPTRIGGER_ENABLE_SYNCHRONOUS_OPTION=1
-       CATCHUPTRIGGER_ENABLE_SYNCHRONOUS_OPTION=1 ../../../../../bin/behat -c behat.yml.dist Features/
+   .. code-block:: bash
 
-       popd
+       CATCHUPTRIGGER_ENABLE_SYNCHRONOUS_OPTION=1 bin/behat -c Packages/Neos/Neos.ContentRepository.BehavioralTests/Tests/Behavior/behat.yml.dist
 
 Alternatively, if you want to reproduce errors as they happen inside the CI system, but you
 develop on Mac OS, you might want to run the Behat tests in a Docker container (= a linux environment)