Fix various source comment typos

Found via codespell

src/Mod/BIM/bimcommands/BimLayers.py

@@ -68,7 +68,7 @@ class BIM_Layers:
 
         from PySide import QtGui
 
-        # chech if the dialog is running)
+        # check if the dialog is running)
         if getattr(self, "dialog", None):
             return
 

src/Mod/BIM/importers/importWebGL.py

@@ -205,7 +205,7 @@ def export(
     """Exports objects to an html file.
 
     Returns:
-        bool: True if export was successful, False if not (particulary,
+        bool: True if export was successful, False if not (particularly,
         False if no template was available).
     """
 

src/Mod/Sketcher/SketcherTests/TestSketcherSolver.py

@@ -465,7 +465,7 @@ class TestSketcherSolver(unittest.TestCase):
             [Sketcher.Constraint("Block", c_idx), Sketcher.Constraint("Block", l_idx)]
         )
         expected_distance = radius / 2  # note that we don't set this in the constraint below!
-        # TODO: addConstraint(constraint) triggers a solve (for godd reasons) however, this way
+        # TODO: addConstraint(constraint) triggers a solve (for good reasons) however, this way
         # one cannot add non-driving constraints. In contrast, addConstraint(list(constraint))
         # does not solve automatically, thus we use this "overload".
         # Much nicer would be an addConstraint(constraint, isReference=False), like addGeometry