Update CITATION.cff

Author: koenderks

CITATION.cff

@@ -9,7 +9,7 @@ type: software
 license: GPL-3.0-or-later
 title: 'jfa: Bayesian and Classical Audit Sampling'
 version: 0.6.4
-abstract: Provides statstical audit sampling methods as implemented in JASP for Audit
+abstract: Provides statistical audit sampling methods as implemented in JASP for Audit
   (Derks et al., 2021 <doi:10.21105/joss.02733>). The package makes it easy for an
   auditor to plan a statistical sample, select the sample from the population, and
   evaluate the misstatement in the sample compliant with the International Standards