upgrade serf to v0.9.8 (#13062)

* upgrade serf to v0.9.8

* add changelog

* Update .changelog/13062.txt

Co-authored-by: Dan Upton <daniel@floppy.co>

Co-authored-by: Dan Upton <daniel@floppy.co>

.changelog/13062.txt

@@ -0,0 +1,3 @@
+```release-note:bug
+serf: upgrade serf to v0.9.8 which fixes a bug that crashes Consul when serf keyrings are listed
+```

go.mod

@@ -50,7 +50,7 @@ require (
 	github.com/hashicorp/raft v1.3.9
 	github.com/hashicorp/raft-autopilot v0.1.6
 	github.com/hashicorp/raft-boltdb/v2 v2.2.2
-	github.com/hashicorp/serf v0.9.7
+	github.com/hashicorp/serf v0.9.8
 	github.com/hashicorp/vault/api v1.0.5-0.20200717191844-f687267c8086
 	github.com/hashicorp/vault/sdk v0.1.14-0.20200519221838-e0cfd64bc267
 	github.com/hashicorp/yamux v0.0.0-20210826001029-26ff87cf9493

go.sum

@@ -378,8 +378,8 @@ github.com/hashicorp/raft-boltdb v0.0.0-20211202195631-7d34b9fb3f42/go.mod h1:wc
 github.com/hashicorp/raft-boltdb/v2 v2.2.2 h1:rlkPtOllgIcKLxVT4nutqlTH2NRFn+tO1wwZk/4Dxqw=
 github.com/hashicorp/raft-boltdb/v2 v2.2.2/go.mod h1:N8YgaZgNJLpZC+h+by7vDu5rzsRgONThTEeUS3zWbfY=
 github.com/hashicorp/serf v0.9.6/go.mod h1:TXZNMjZQijwlDvp+r0b63xZ45H7JmCmgg4gpTwn9UV4=
-github.com/hashicorp/serf v0.9.7 h1:hkdgbqizGQHuU5IPqYM1JdSMV8nKfpuOnZYXssk9muY=
-github.com/hashicorp/serf v0.9.7/go.mod h1:TXZNMjZQijwlDvp+r0b63xZ45H7JmCmgg4gpTwn9UV4=
+github.com/hashicorp/serf v0.9.8 h1:JGklO/2Drf1QGa312EieQN3zhxQ+aJg6pG+aC3MFaVo=
+github.com/hashicorp/serf v0.9.8/go.mod h1:TXZNMjZQijwlDvp+r0b63xZ45H7JmCmgg4gpTwn9UV4=
 github.com/hashicorp/vault/api v1.0.5-0.20200717191844-f687267c8086 h1:OKsyxKi2sNmqm1Gv93adf2AID2FOBFdCbbZn9fGtIdg=
 github.com/hashicorp/vault/api v1.0.5-0.20200717191844-f687267c8086/go.mod h1:R3Umvhlxi2TN7Ex2hzOowyeNb+SfbVWI973N+ctaFMk=
 github.com/hashicorp/vault/sdk v0.1.14-0.20200519221838-e0cfd64bc267 h1:e1ok06zGrWJW91rzRroyl5nRNqraaBe4d5hiKcVZuHM=