Increase disk warning and critical thresholds

The warning threshold is now 90% and the critical threshold is 95%,
up from 80% and 90%.

modules/home/noctalia/settings/system-monitor.nix

@@ -16,8 +16,8 @@ in {
     memCriticalThreshold = 90;
     swapWarningThreshold = 80;
     swapCriticalThreshold = 90;
-    diskWarningThreshold = 80;
-    diskCriticalThreshold = 90;
+    diskWarningThreshold = 90;
+    diskCriticalThreshold = 95;
     cpuPollingInterval = 3000;
     tempPollingInterval = 3000;
     gpuPollingInterval = 3000;