[rans] Fix doxygen documentation

doc/doxygen/modules.txt

@@ -188,13 +188,12 @@
        * \ingroup RANSModel
        * \defgroup ZeroEqModel 0-Eq. Models
        * \brief Zero-equation or algebraic turbulence models
-       * \copydetails ./freeflow/rans/model.hh
+       * \copydetails ./freeflow/rans/zeroeq/model.hh
        */
       /*!
        * \ingroup RANSModel
        * \defgroup TwoEqModel 2-Eq. Models
        * \brief Two-equation turbulence models
-       * \copydetails ./freeflow/rans/model.hh
        */
         /*!
          * \ingroup TwoEqModel

dumux/freeflow/rans/twoeq/lowrekepsilon/staggered/localresidual.hh

@@ -19,7 +19,7 @@
  /*!
   * \file
   * \ingroup LowReKEpsilonModel
-  * \copydoc Dumux::LowReKepsilonResidualImpl
+  * \copydoc Dumux::LowReKEpsilonResidualImpl
   */
 #ifndef DUMUX_STAGGERED_LOWREKEPSILON_LOCAL_RESIDUAL_HH
 #define DUMUX_STAGGERED_LOWREKEPSILON_LOCAL_RESIDUAL_HH