Update to tk-flame 1.15.3 (#74)

JIRA: SMOK-51794
Shotgun batch render do not set assetType correctly

Author: jpbrault

env/includes/common/engines.yml

@@ -51,7 +51,7 @@ common.engines.tk-aftereffects.location:
 common.engines.tk-flame.location:
   type: app_store
   name: tk-flame
-  version: v1.15.2
+  version: v1.15.3
 
 # Desktop
 common.engines.tk-desktop.location: