bump boost significantly

the AddChainInbound test is consistently failing with a "message too
costly" error in exec; increasing the relative boost per wait hour
causes exec to significantly boost the paid fee so we can execute the
message.

deployment/ccip/changeset/internal/deploy_home_chain.go

@@ -30,7 +30,7 @@ const (
 	RemoteGasPriceBatchWriteFrequency       = 30 * time.Minute
 	TokenPriceBatchWriteFrequency           = 30 * time.Minute
 	BatchGasLimit                           = 6_500_000
-	RelativeBoostPerWaitHour                = 1.5
+	RelativeBoostPerWaitHour                = 10000.5
 	InflightCacheExpiry                     = 10 * time.Minute
 	RootSnoozeTime                          = 30 * time.Minute
 	BatchingStrategyID                      = 0