fix: standardize on file extension .yaml instead of a mix of yml and yaml

dist/expansion-packs/bmad-infrastructure-devops/agents/infra-devops-platform.txt

@@ -118,7 +118,7 @@ Generate documents from templates by EXECUTING (not just reading) embedded instr
 
 ### 0. Check Workflow Plan (if configured)
 
-[[LLM: Check if plan tracking is enabled in core-config.yml]]
+[[LLM: Check if plan tracking is enabled in core-config.yaml]]
 
 - If `workflow.trackProgress: true`, check for active plan using utils#plan-management
 - If plan exists and this document creation is part of the plan:
@@ -1300,7 +1300,7 @@ kind: ConfigMap
 metadata:
   name: prometheus-config
 data:
-  prometheus.yml: |
+  prometheus.yaml: |
     global:
       scrape_interval: {{scrape_interval}}
     scrape_configs: