mod: bump tor submodule to v1.1.5 to fix flake

After merging #9581, the flake in the coverage unit test should be gone.
All we have to do is update the submodule version to the fixed one
(since during unit tests the module is used not the physical directory
on disk).

go.mod

@@ -43,7 +43,7 @@ require (
 	github.com/lightningnetwork/lnd/sqldb v1.0.7
 	github.com/lightningnetwork/lnd/ticker v1.1.1
 	github.com/lightningnetwork/lnd/tlv v1.3.0
-	github.com/lightningnetwork/lnd/tor v1.1.4
+	github.com/lightningnetwork/lnd/tor v1.1.5
 	github.com/ltcsuite/ltcd v0.0.0-20190101042124-f37f8bf35796
 	github.com/miekg/dns v1.1.43
 	github.com/pkg/errors v0.9.1