[Releng] Add 2020-09 for marketplace catalog generator.
diff --git a/plugins/org.eclipse.oomph.setup.installer/src/org/eclipse/oomph/setup/internal/installer/MarketplaceCatalogGenerator.java b/plugins/org.eclipse.oomph.setup.installer/src/org/eclipse/oomph/setup/internal/installer/MarketplaceCatalogGenerator.java
index 534e1f8..29fccd5 100644
--- a/plugins/org.eclipse.oomph.setup.installer/src/org/eclipse/oomph/setup/internal/installer/MarketplaceCatalogGenerator.java
+++ b/plugins/org.eclipse.oomph.setup.installer/src/org/eclipse/oomph/setup/internal/installer/MarketplaceCatalogGenerator.java
@@ -314,6 +314,7 @@
     platformVersions.put("platform.version=4.14", "2019-12");
     platformVersions.put("platform.version=4.15", "2020-03");
     platformVersions.put("platform.version=4.16", "2020-06");
+    platformVersions.put("platform.version=4.17", "2020-09");
 
     Set<URI> nodeQueryURIs = new LinkedHashSet<URI>();
     {