Update module github.com/pion/webrtc/v3 to v4

Generated by renovateBot

Author: renovate[bot]

go.mod

@@ -4,7 +4,7 @@ go 1.12
 
 require (
 	github.com/deepch/vdk v0.0.0-20211113104208-022deeb641f7
-	github.com/pion/webrtc/v3 v3.1.1
+	github.com/pion/webrtc/v4 v4.0.5
 	github.com/shirou/gopsutil v3.22.2+incompatible
 	github.com/tklauser/go-sysconf v0.3.9 // indirect
 	github.com/yusufpapurcu/wmi v1.2.2 // indirect