HF is struggling under the load

This is not a reserved instance. CPU idles at about 100%. Needs more
horses.

prod/aws-us-gov/mdr-prod-c2/account.hcl

@@ -167,7 +167,7 @@ locals {
     "rhsso"          = "m5a.large",
     "rhsso-db"       = "db.t3.micro"
     "splunk-cm"      = "m5a.xlarge",
-    "splunk-hf"      = "m5a.xlarge",
+    "splunk-hf"      = "m5a.4xlarge",
     "splunk-indexer" = "i3en.3xlarge",
     "splunk-mc"      = "m5a.large", # Legacy: t2.small, prod m4.large
     "splunk-sh"      = "m5a.4xlarge",