fixed typo

git-svn-id: https://svn.apache.org/repos/asf/maven/plugins/trunk@1702357 13f79535-47bb-0310-9956-ffa450edef68
diff --git a/src/main/resources/jira-report.properties b/src/main/resources/jira-report.properties
index 5dc6b82..cfcd067 100644
--- a/src/main/resources/jira-report.properties
+++ b/src/main/resources/jira-report.properties
@@ -17,7 +17,7 @@
 
 report.issues.name=JIRA Report
 report.issues.description=Report on Issues from the JIRA Issue Tracking System.
-report.issues.error=An error occured that made it impossible to generate this report. \
+report.issues.error=An error occurred that made it impossible to generate this report. \
   Please check the console for information on what might be the cause of this.
 report.issues.header=JIRA Report
 report.issues.label.assignee=By