[unticketed]: added missing pinpoint variable (#7057)

## Summary

added a missing variable

Author: myduong-navapbc

api/local.env

@@ -121,6 +121,12 @@ IS_LOCAL_AWS=1
 # For local development, use a placeholder value since we mock AWS calls
 API_GATEWAY_DEFAULT_USAGE_PLAN_ID=local-dev-usage-plan
 
+############################
+# AWS PINPOINT APP
+############################
+
+AWS_PINPOINT_APP_ID=dummy-local-id
+
 ############################
 # Feature Flags
 ############################