fixed date format

Author: tjanson

app/src/main/assets/logback.xml

@@ -17,7 +17,7 @@
         <file>${LOG_DIR}/${LOG_FILE}.csv</file>
 
         <encoder>
-            <pattern>%date{yyyy-mm-dd HH:mm:ss.SSS},%msg%n</pattern>
+            <pattern>%date{yyyy-MM-dd HH:mm:ss.SSS},%msg%n</pattern>
         </encoder>
 
         <rollingPolicy class="ch.qos.logback.core.rolling.TimeBasedRollingPolicy">