Fix gblsr-scalar trained_steps -> 2000 (native matched-budget; was hardcoded 1000000)

gblsr-scalar/config.json

@@ -11,5 +11,5 @@
   },
   "seed": 0,
   "trainable_params": 989955,
-  "trained_steps": 1000000
+  "trained_steps": 2000
 }