Fixed some formatting inconsistencies

packages/announcements.yaml

@@ -87,7 +87,7 @@ automation:
   - id: db50d96f-8e2a-4e48-8d7c-ce5968527b82
     alias: Kallen Morning Briefing
     trigger:
-      platform: time
+    - platform: time
       at: input_datetime.kallen_morning_briefing
     condition:
     - condition: state
@@ -99,7 +99,7 @@ automation:
   - id: b8d21d04-c263-4d33-9590-9fb1e76b0de8
     alias: Kallen Nightly Briefing
     trigger:
-      platform: time
+    - platform: time
       at: input_datetime.kallen_nightly_briefing
     condition:
     - condition: state
@@ -116,7 +116,7 @@ automation:
   - id: c53d84ee-9e6d-4268-8d44-d427c722602a
     alias: Daily Briefing
     trigger:
-      platform: time
+    - platform: time
       at: input_datetime.daily_report
     condition:
     - condition: state