Downloads: reference the zip archive for the Feature Launcher

The jar file is no longer self-contained so downloading it is less useful.
diff --git a/src/main/jbake/templates/downloads.tpl b/src/main/jbake/templates/downloads.tpl
index 36cf7da..e33452f 100644
--- a/src/main/jbake/templates/downloads.tpl
+++ b/src/main/jbake/templates/downloads.tpl
@@ -28,7 +28,7 @@
   "Sling Starter Feature Archive (Oak-Mongo)|A self-container feature archive, for experimenting and learning. Requires the Feature Model Launcher (see below) |org.apache.sling.starter|-oak_tar_far.far|${starterVersion}|Y|apache/sling:${starterVersion}",
   "Sling Starter Source Release|The released Sling Starter source code|org.apache.sling.starter|-source-release.zip|${starterVersion}|Y",
   "Sling CMS App|A reference CMS App built on Apache Sling|org.apache.sling.cms.feature|.jar|1.1.0|org.apache.sling.app.cms",
-  "Sling Feature Model Launcher|A tool for launching OSGi applications|org.apache.sling.feature.launcher|.jar|1.2.0|Y",
+  "Sling Feature Model Launcher|A tool for launching OSGi applications|org.apache.sling.feature.launcher|.zip|1.2.0|Y",
   "Sling Feature Model converter|A CLI tool for converting from content packages to feature model files|org.apache.sling.feature.cpconverter|.zip|1.1.2|Y",
 ]