Fix README copyright

ahornace · Vladimir Kotal · commit 61ddd52ee7d2 · 2020-09-24T10:15:29.000+02:00
Fixes a year in copyright as it looks that the project is up-to-date.
diff --git a/README.md b/README.md
@@ -1,5 +1,5 @@
 
-Copyright (c) 2006, 2019 Oracle and/or its affiliates. All rights reserved.
+Copyright (c) 2006, 2020 Oracle and/or its affiliates. All rights reserved.
 
 
 # OpenGrok - a wicked fast source browser

Original file line number	Diff line number	Diff line change
`@@ -1,5 +1,5 @@`
`1`	`1`
`2`		`-Copyright (c) 2006, 2019 Oracle and/or its affiliates. All rights reserved.`
	`2`	`+Copyright (c) 2006, 2020 Oracle and/or its affiliates. All rights reserved.`
`3`	`3`
`4`	`4`
`5`	`5`	`# OpenGrok - a wicked fast source browser`