fix(monitoring): restore trailing newline in GPU dashboards

Signed-off-by: Arsolitt <arsolitt@gmail.com>

dashboards/gpu/gpu-efficiency.json

@@ -838,4 +838,4 @@
     ]
   },
   "annotations": {}
-}
+}

dashboards/gpu/gpu-quotas.json

@@ -627,4 +627,4 @@
     ]
   },
   "annotations": {}
-}
+}