DOC: stats.dpareto_lognorm: docstring fixup

[docs only]

Author: mdhaber

scipy/stats/_continuous_distns.py

@@ -1846,7 +1846,7 @@ class dpareto_lognorm_gen(rv_continuous):
         \left( R(y_1) + R(y_2) \right)
 
     where :math:`R(t) = \frac{1 - \Phi(t)}{\phi(t)}`,
-    :math:`phi` and :math:`Phi` are the normal PDF and CDF, respectively,
+    :math:`\phi` and :math:`\Phi` are the normal PDF and CDF, respectively,
     :math:`y_1 = \alpha \sigma - \frac{\log x - \mu}{\sigma}`,
     and :math:`y_2 = \beta \sigma + \frac{\log x - \mu}{\sigma}`
     for real numbers :math:`x` and :math:`\mu`, :math:`\sigma > 0`,