Validate beta only on demand

To reduce number of unnecessary runs (when no beta is available)

.github/workflows/validate_esphome_beta.yml

@@ -2,9 +2,9 @@ name: Validate ESPHome (beta)
 
 on:
   workflow_dispatch:
-  pull_request:
-    paths:
-      - "nspanel_esphome*.yaml"
+  #pull_request:
+  #  paths:
+  #    - "nspanel_esphome*.yaml"
   #schedule:
     #- cron: "0 0 * * *"