🐢 Minor fix on top of grammar fixed in docs

Author: Larry Dong

pymc3/distributions/continuous.py

@@ -4251,4 +4251,4 @@ def logcdf(self, value):
         return bound(
             at.log(at.erfc(at.exp(-scaled / 2) * (2 ** -0.5))),
             0 < sigma,
-        )
+        )