Document that gerrit supports JDK 11

Change-Id: I430a2022764e526bea70d97f5a06419f2d968f8d

Documentation/install.txt

diff --git a/Documentation/install.txt b/Documentation/install.txt
index b6a2954..2f00492 100644
--- a/Documentation/install.txt
+++ b/Documentation/install.txt
@@ -5,9 +5,9 @@
 
 To run the Gerrit service, the following requirement must be met on the host:
 
-* JRE, version 1.8 http://www.oracle.com/technetwork/java/javase/downloads/index.html[Download]
+* JRE, versions 1.8 or 11 http://www.oracle.com/technetwork/java/javase/downloads/index.html[Download]
 +
-Gerrit is not yet compatible with Java 9 or newer at this time.
+Gerrit is not yet compatible with Java 13 or newer at this time.
 
 By default, Gerrit uses link:note-db.html[NoteDB] as the storage backend. (If
 desired, you can _optionally_ use an external database such as MySQL or