Fix bullets in docstrings for is_skew and axes_of_symmetry to fixs sphinx rendering and build errors

src/build123d/geometry.py

@@ -811,8 +811,10 @@ class Axis(metaclass=AxisMeta):
         and never intersect.
 
         Mathematically, this means:
+
         - The axes are **not parallel** (the cross product of their direction vectors
           is nonzero).
+
         - The axes are **not coplanar** (the vector between their positions is not
           aligned with the plane spanned by their directions).
 

src/build123d/topology/two_d.py

@@ -393,16 +393,21 @@ class Face(Mixin2D, Shape[TopoDS_Face]):
 
         The method determines potential symmetry axes by analyzing the face’s
         geometry:
+
         - It first validates that the face is non-empty and planar.
+
         - For faces with inner wires (holes), it computes the centroid of the
           holes and the face's overall center (COG).
-            If the holes' centroid significantly deviates from the COG (beyond
+
+            - If the holes' centroid significantly deviates from the COG (beyond
               a specified tolerance), the symmetry axis is taken along the line
               connecting these points; otherwise, each hole’s center is used to
               generate a candidate axis.
+
         - For faces without holes, candidate directions are derived by sampling
           midpoints along the outer wire's edges.
-            If curved edges are present, additional candidate directions are
+
+            - If curved edges are present, additional candidate directions are
               obtained from an oriented bounding box (OBB) constructed around the
               face.