update config to see if this resolves pushover failures

Author: carpenike

kubernetes/cluster-0/apps/monitoring/gatus/app/resources/config.yaml

@@ -12,8 +12,8 @@ ui:
   header: Status
 alerting:
   pushover:
-    application-token: ${CUSTOM_PUSHOVER_APP_TOKEN}
-    user-key: ${CUSTOM_PUSHOVER_USER_KEY}
+    application-token: $${CUSTOM_PUSHOVER_APP_TOKEN}
+    user-key: $${CUSTOM_PUSHOVER_USER_KEY}
     default-alert:
       description: health-check failed
       send-on-resolved: true