fix: use HTML math for slider description

Math mode in ipywidgets doesn't render well when using LaTeX dollar
signs for math mode. HTML math mode \(\) works well both in Jupyter
notebook and in HTML.

src/symplot/__init__.py

@@ -267,7 +267,7 @@ def create_slider(symbol: sp.Symbol) -> Slider:
     >>> create_slider(sp.Symbol("n", integer=True))
     IntSlider(value=0, description='$n$')
     """
-    description = f"${sp.latex(symbol)}$"
+    description = fR"\({sp.latex(symbol)}\)"
     if symbol.is_integer:
         return IntSlider(description=description)
     return FloatSlider(description=description)