FEM: typos, found with:

codespell -q 2 -S *.ts -S *.dyn -S *.svg  -L childs,dof,dum,freez,methode,nd,normaly,programm,som,uint,vertexes,inout  src/Mod/Fem/

src/Mod/Fem/App/FemConstraintBearing.cpp

@@ -65,7 +65,7 @@ App::DocumentObjectExecReturn *ConstraintBearing::execute(void)
 void ConstraintBearing::onChanged(const App::Property* prop)
 {
     //Base::Console().Error("ConstraintBearing: onChanged %s\n", prop->getName());
-    // Note: If we call this at the end, then the symbol ist not oriented correctly initially
+    // Note: If we call this at the end, then the symbol is not oriented correctly initially
     // because the NormalDirection has not been calculated yet
     Constraint::onChanged(prop);