Harmonize link text in ITS comments

While the link text in ITS comments for gerrit comments started in
  Gerrit Change [Change-Id]
(without colon), the link text in ITS comments for added patch sets
started in
  Gerrit Patch-Set: [Change-Id]/[Patch Set-Id]
(with colon). We now harmonize those messages and drop the colon.

Change-Id: I535c1186a469e746a65bd7024c0f5c65cedd49b7

hooks-its/src/main/java/com/googlesource/gerrit/plugins/hooks/workflow/GerritHookFilterAddRelatedLinkToChangeId.java

diff --git a/hooks-its/src/main/java/com/googlesource/gerrit/plugins/hooks/workflow/GerritHookFilterAddRelatedLinkToChangeId.java b/hooks-its/src/main/java/com/googlesource/gerrit/plugins/hooks/workflow/GerritHookFilterAddRelatedLinkToChangeId.java
index ec46d48..a404fea 100644
--- a/hooks-its/src/main/java/com/googlesource/gerrit/plugins/hooks/workflow/GerritHookFilterAddRelatedLinkToChangeId.java
+++ b/hooks-its/src/main/java/com/googlesource/gerrit/plugins/hooks/workflow/GerritHookFilterAddRelatedLinkToChangeId.java
@@ -53,7 +53,7 @@
 
     for (String issue : issues) {
       its.addRelatedLink(issue, new URL(patchsetCreated.change.url),
-          "Gerrit Patch-Set: " + patchsetCreated.change.id + "/"
+          "Gerrit Patch-Set " + patchsetCreated.change.id + "/"
               + patchsetCreated.patchSet.number);
     }
   }