header url changed

#368 (comment)

Author: asakaxgit

config/checkstyle.properties

@@ -1,6 +1,6 @@
 checkstyle.suppressions.file=config/suppressions.xml
 checkstyle.suppressions-xpath.file=config/suppressions.xml
 checkstyle.header.file=https://raw.githubusercontent.com/checkstyle/checkstyle/master/config/java.header
-checkstyle.regexp.header.file=https://raw.githubusercontent.com/checkstyle/checkstyle/master/config/java_regexp.header
+checkstyle.regexp.header.file=https://raw.githubusercontent.com/checkstyle/checkstyle/master/config/java-regexp.header
 checkstyle.importcontrol.file=config/import-control.xml
 checkstyle.importcontroltest.file=config/import-control-test.xml