src/sage/interacts/test_jupyter.rst: add long times

Fix the CI warnings,

  2025-07-14T18:37:47.9759323Z ##[warning]slow doctest:
  2025-07-14T18:37:47.9761301Z     test(interacts.calculus.function_tool)
  2025-07-14T18:37:47.9777019Z Test ran for 5.54s cpu, 6.28s wall

  2025-07-14T18:37:55.5143193Z ##[warning]slow doctest:
  2025-07-14T18:37:55.5169150Z     test(interacts.fractals.mandelbrot)
  2025-07-14T18:37:55.5169618Z Test ran for 5.78s cpu, 7.53s wall

  2025-07-14T18:38:02.1158079Z ##[warning]slow doctest:
  2025-07-14T18:38:02.1159474Z     test(interacts.fractals.julia)
  2025-07-14T18:38:02.1159994Z Test ran for 6.21s cpu, 6.60s wall

  2025-07-14T18:38:14.6948348Z ##[warning]slow doctest:
  2025-07-14T18:38:14.6950545Z     test(interacts.geometry.special_points)
  2025-07-14T18:38:14.6951067Z Test ran for 6.04s cpu, 6.08s wall

by adding "# long time" to these tests.

Author: orlitzky

src/sage/interacts/test_jupyter.rst

@@ -205,7 +205,7 @@ Test all interacts from the Sage interact library::
     Exact value of the integral \(\displaystyle\int_{0}^{2}x^{2} +
     1\,\mathrm{d}x=4.666666666666668\)
 
-    sage: test(interacts.calculus.function_tool)
+    sage: test(interacts.calculus.function_tool)  # long time
     ...Interactive function <function function_tool at ...> with 7 widgets
       f: EvalText(value='sin(x)', description='f')
       g: EvalText(value='cos(x)', description='g')
@@ -218,7 +218,7 @@ Test all interacts from the Sage interact library::
     <center><font color="green">\(g = \cos\left(x\right)\)</font></center>
     <center><font color="blue"><b>\(h = f = \sin\left(x\right)\)</b></font></center>
 
-    sage: test(interacts.fractals.mandelbrot)
+    sage: test(interacts.fractals.mandelbrot)  # long time
     ...Interactive function <function mandelbrot at ...> with 6 widgets
       expo: FloatSlider(value=2.0, description='expo', max=10.0, min=-10.0)
       iterations: IntSlider(value=20, description='# iterations', min=1)
@@ -229,7 +229,7 @@ Test all interacts from the Sage interact library::
     <h2>Mandelbrot Fractal</h2>
     Recursive Formula: \(z \leftarrow z^{2.00} + c\) for \(c \in \mathbb{C}\)
 
-    sage: test(interacts.fractals.julia)
+    sage: test(interacts.fractals.julia)  # long time
     ...Interactive function <function julia at ...> with 8 widgets
       expo: FloatSlider(value=2.0, description='expo', max=10.0, min=-10.0)
       c_real: FloatSlider(value=0.5, description='real part const.', max=2.0, min=-2.0, step=0.01)
@@ -265,7 +265,7 @@ Test all interacts from the Sage interact library::
     \(AB = 1.931852\), \(BC = 1.732051\), \(CA = 1.414214\)
     Area of triangle \(ABC = 1.183013\)
 
-    sage: test(interacts.geometry.special_points)
+    sage: test(interacts.geometry.special_points)  # long time
     ...Interactive function <function special_points at ...> with 10 widgets
       title: HTMLText(value='<h2>Special points in triangle</h2>')
       a0: IntSlider(value=30, description='A', max=360)