Documentation: Link to current Maven Central in dev-release

As its URL scheme (and reachable sub-domain) changed since [1].

[1] https://blog.sonatype.com/central-repository-moving-to-https

Change-Id: I28cb0b4f9e58c702c464c922de27c1aa77aca5b5
diff --git a/Documentation/dev-release.txt b/Documentation/dev-release.txt
index 331e234..785ebe1 100644
--- a/Documentation/dev-release.txt
+++ b/Documentation/dev-release.txt
@@ -269,7 +269,7 @@
 ** It may take up to 2 hours until the artifacts appear on Maven
 Central:
 +
-http://central.maven.org/maven2/com/google/gerrit/
+https://repo1.maven.org/maven2/com/google/gerrit/
 
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