Fixed latex raising ^*

It works in mathjax, but the pdf convertor cannot handle it. Changing
it to ^{*} works.

10-Unscented-Kalman-Filter.ipynb

@@ -20643,7 +20643,7 @@
     "This definition is favored because $\\mathbf S$ is computed using the [*Cholesky decomposition*](https://en.wikipedia.org/wiki/Cholesky_decomposition) [3]. It decomposes a Hermitian, positive-definite matrix into a triangular matrix and its conjugate transpose. The matrix can be either upper \n",
     "or lower triangular, like so:\n",
     "\n",
-    "$$A=LL^∗ \\\\ A=U^∗U$$\n",
+    "$$A=LL^{∗} \\\\ A=U^{∗}U$$\n",
     "\n",
     "The asterick denotes the conjugate transpose; we have only real numbers so for us we can write:\n",
     "\n",