cmd/lncli: fix linter complaint by running make fmt #11631

Job	Run time
Sqlc check	21s
check commits	4m 25s
cross compilation	15m 57s
lint code	7m 7s
RPC and mobile compilation check	2m 58s
sample configuration check	1m 2s
run unit tests (btcd unit-cover)	19m 8s
run unit tests (unit tags="kvdb_etcd")	20m 54s
run unit tests (unit tags="kvdb_postgres")	19m 41s
check pinned dependencies (google.golang.org/grpc v1.53.0)	6s
run unit tests (unit tags="kvdb_sqlite")	17m 55s
check pinned dependencies (github.com/golang/protobuf v1.5.2)	5s
run unit tests (btcd unit-race)	40m 14s
run unit tests (unit-module)	1m 1s
check release notes updated	4s
run ubuntu itests (btcd, backend=btcd)	49m 15s
run windows itest	25m 52s
run ubuntu itests (bitcoind, backend=bitcoind)	1h 4m 7s
run ubuntu itests (bitcoind-notxindex, backend="bitcoind notxindex")	1h 3m 48s
run ubuntu itests (bitcoind-rpcpolling, backend="bitcoind rpcpolling")	1h 1m 38s
run ubuntu itests (bitcoind-etcd, backend=bitcoind dbbackend=etcd)	1h 34m 40s
run ubuntu itests (bitcoind-postgres, backend=bitcoind dbbackend=postgres)	1h 13m 24s
run ubuntu itests (bitcoind-sqlite, backend=bitcoind dbbackend=sqlite)	1h 13m 57s
run ubuntu itests (neutrino, backend=neutrino)	58m 18s
	11h 55m 57s

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