SitePathInitializer: Add missing "AddKeyHtml.soy"

Change-Id: Iad89ce2ac3f0f28bd6789fefd0b2179369734f1d
diff --git a/gerrit-pgm/src/main/java/com/google/gerrit/pgm/init/SitePathInitializer.java b/gerrit-pgm/src/main/java/com/google/gerrit/pgm/init/SitePathInitializer.java
index be61061..647bb6b 100644
--- a/gerrit-pgm/src/main/java/com/google/gerrit/pgm/init/SitePathInitializer.java
+++ b/gerrit-pgm/src/main/java/com/google/gerrit/pgm/init/SitePathInitializer.java
@@ -107,6 +107,7 @@
     extractMailExample("Abandoned.soy");
     extractMailExample("AbandonedHtml.soy");
     extractMailExample("AddKey.soy");
+    extractMailExample("AddKeyHtml.soy");
     extractMailExample("ChangeFooter.soy");
     extractMailExample("ChangeFooterHtml.soy");
     extractMailExample("ChangeSubject.soy");