typo fix

Co-authored-by: Max Balandat <[email protected]>

notebooks_community/clf_constrained_bo.ipynb

@@ -431,7 +431,7 @@
    "metadata": {},
    "source": [
     "### Perform BO loop\n",
-    "We initialize the BO loop with 10 random points from SOBEL sequence. We then perform 50 iterations of BO. The acquisition function value, the underlying constraint probability, and the expected improvement value are plotted at every 10 iterations."
+    "We initialize the BO loop with 10 random points from SOBOL sequence. We then perform 50 iterations of BO. The acquisition function value, the underlying constraint probability, and the expected improvement value are plotted at every 10 iterations."
    ]
   },
   {