Add Orchestrator logo to logos/llnl and repo_logos.json

Author: kbushick

assets/images/logos/llnl/orchestrator.png

@@ -45,6 +45,7 @@
         "llnl/merlin.png",
         "llnl/merlin-spellbook.png",
         "llnl/merlinworkflows.png",
+        "llnl/orchestrator.png",
         "llnl/psuade.png",
         "llnl/psuade-lite.png",
         "llnl/pylibrom.png",