PD: Increase the tolerance to check for planar surfaces

The default tolerance to check for a planar B-spline surface is 1.0e-7 which might be too strict in some cases.
Therefore the tolerance is increased to 2.0e-7.

This fixes issue 21242

src/Mod/PartDesign/Gui/SketchWorkflow.cpp

@@ -141,7 +141,7 @@ public:
             throw WrongSupportException();
         }
 
-        if (!subshape.isPlanar()) {
+        if (!subshape.isPlanar(Attacher::AttachEnginePlane::planarPrecision())) {
             throw SupportNotPlanarException();
         }
     }