upgrade poi

pom.xml

@@ -138,7 +138,7 @@ cobbzilla-utils is available under the Apache License, version 2: http://www.apa
         <dependency>
             <groupId>org.apache.poi</groupId>
             <artifactId>poi-ooxml</artifactId>
-            <version>4.1.1</version>
+            <version>4.1.2</version>
         </dependency>
 
         <dependency>