Fix links

Author: felixbarny

README.md

@@ -81,9 +81,9 @@ We recommend using this library to log into a JSON log file and let Filebeat sen
 |[`@timestamp`](https://www.elastic.co/guide/en/ecs/current/ecs-base.html) | [`LogEvent#getTimeMillis()`](https://logging.apache.org/log4j/log4j-2.3/log4j-core/apidocs/org/apache/logging/log4j/core/LogEvent.html#getTimeMillis()) |
 |[`log.level`](https://www.elastic.co/guide/en/ecs/current/ecs-log.html) | [`LogEvent#getLevel()`](https://logging.apache.org/log4j/log4j-2.3/log4j-core/apidocs/org/apache/logging/log4j/core/LogEvent.html#getLevel()) |
 |[`log.logger`](https://www.elastic.co/guide/en/ecs/current/ecs-log.html)|[`LogEvent#getLoggerName()`](https://logging.apache.org/log4j/log4j-2.3/log4j-core/apidocs/org/apache/logging/log4j/core/LogEvent.html#getLoggerName())|
-|[`log.origin.file.name`](https://www.elastic.co/guide/en/ecs/current/ecs-log.html)|[StackTraceElement#getFileName()](https://docs.oracle.com/javase/6/docs/api/java/lang/StackTraceElement.html#getFileName())|
-|[`log.origin.file.line`](https://www.elastic.co/guide/en/ecs/current/ecs-log.html)|[`[StackTraceElement#getLineNumber()]()`](https://docs.oracle.com/javase/6/docs/api/java/lang/StackTraceElement.html#getLineNumber())|
-|[`log.origin.function`](https://www.elastic.co/guide/en/ecs/current/ecs-log.html)|[`[StackTraceElement#getMethodName()]()`](https://docs.oracle.com/javase/6/docs/api/java/lang/StackTraceElement.html#getMethodName())|
+|[`log.origin.file.name`](https://www.elastic.co/guide/en/ecs/current/ecs-log.html)|[`StackTraceElement#getFileName()`](https://docs.oracle.com/javase/6/docs/api/java/lang/StackTraceElement.html#getFileName())|
+|[`log.origin.file.line`](https://www.elastic.co/guide/en/ecs/current/ecs-log.html)|[`StackTraceElement#getLineNumber()`](https://docs.oracle.com/javase/6/docs/api/java/lang/StackTraceElement.html#getLineNumber())|
+|[`log.origin.function`](https://www.elastic.co/guide/en/ecs/current/ecs-log.html)|[`StackTraceElement#getMethodName()`](https://docs.oracle.com/javase/6/docs/api/java/lang/StackTraceElement.html#getMethodName())|
 |[`message`](https://www.elastic.co/guide/en/ecs/current/ecs-base.html)|[`LogEvent#getMessage()`](https://logging.apache.org/log4j/log4j-2.3/log4j-core/apidocs/org/apache/logging/log4j/core/LogEvent.html#getMessage())|
 |[`error.code`](https://www.elastic.co/guide/en/ecs/current/ecs-error.html)|[`Throwable#getClass()`](https://docs.oracle.com/javase/7/docs/api/java/lang/Object.html#getClass())|
 |[`error.message`](https://www.elastic.co/guide/en/ecs/current/ecs-error.html)|[`Throwable#getStackTrace()`](https://docs.oracle.com/javase/7/docs/api/java/lang/Throwable.html#getMessage())|