tutorials/combustion/reactingFoam/ras/counterFlowFlame2D: Changed p BCs

to totalPressure to avoid unstable entrainment

tutorials/combustion/reactingFoam/ras/counterFlowFlame2D/0/p

@@ -29,14 +29,16 @@ boundaryField
     {
         type            zeroGradient;
     }
-    inlet2
-    {
-        type            zeroGradient;
-    }
     outlet
     {
-        type            fixedValue;
-        value           uniform 1e5;
+        type            totalPressure;
+        p0              $internalField;
+        U               U;
+        phi             phi;
+        rho             none;
+        psi             none;
+        gamma           1;
+        value           $internalField;
     }
     frontAndBack
     {