Update teh schema for the weather hourly report

schemas/pipeline-weather/hourly/hourly.generated_text.schema.json

@@ -6,17 +6,16 @@
   "additionalProperties": false,
   "required": [
     "summary",
-    "timing",
-    "impacts"
+    "forecast_discussion"
   ],
   "properties": {
     "summary": {
       "type": "string"
     },
-    "timing": {
+    "forecast_discussion": {
       "type": "string"
     },
-    "impacts": {
+    "precipitation_timing": {
       "type": "string"
     },
     "confidence": {