Update reland message to link to original commit

This updates reland commit message to include keyword "commit" which
will make commit hash linkable.

R=aravindvasudev@google.com, gavinmak@google.com

Bug: b/221168737
Change-Id: I9f3ded441b1137c41fdcab0bfe9caced990c08db
diff --git a/web/reland-button.ts b/web/reland-button.ts
index e5f84bc..aef578f 100644
--- a/web/reland-button.ts
+++ b/web/reland-button.ts
@@ -144,7 +144,7 @@
   }
   const subject = 'Reland "' + _CURR_CHANGE.subject + '"\n\n';
   const disclaimer =
-    `This is a reland of ${_CURR_CHANGE.current_revision}` +
+    `This is a reland of commit ${_CURR_CHANGE.current_revision}` +
     "\n\nOriginal change's description:\n";
   const quote = orig.replace(/^/gm, '> ').replace(/^> $/gm, '>');
   let message = subject + disclaimer + quote;