fix: typo in "isinstance" in Element.snap. (#2071)

Co-authored-by: Fabio Pliger <fpliger@users.noreply.github.com>
Co-authored-by: Andrea Giammarchi <andrea.giammarchi@gmail.com>

pyscript.core/src/stdlib/pyweb/pydom.py

@@ -267,7 +267,7 @@ class Element(BaseElement):
             canvas._js.width = width
             canvas._js.height = height
 
-        elif isistance(to, Element):
+        elif isinstance(to, Element):
             if to._js.tagName != "CANVAS":
                 raise TypeError("Element to snap to must a canvas.")
             canvas = to