Update module github.com/pion/webrtc/v3 to v3.2.21

Generated by renovateBot

go.mod

@@ -15,7 +15,7 @@ require (
 	github.com/pion/rtcp v1.2.10
 	github.com/pion/rtp v1.8.1
 	github.com/pion/sdp/v3 v3.0.6
-	github.com/pion/webrtc/v3 v3.2.20
+	github.com/pion/webrtc/v3 v3.2.21
 	github.com/stretchr/testify v1.8.4
 	github.com/thoas/go-funk v0.9.3
 	github.com/twitchtv/twirp v8.1.3+incompatible

go.sum

@@ -134,8 +134,8 @@ github.com/pion/transport/v2 v2.2.3 h1:XcOE3/x41HOSKbl1BfyY1TF1dERx7lVvlMCbXU7kf
 github.com/pion/transport/v2 v2.2.3/go.mod h1:q2U/tf9FEfnSBGSW6w5Qp5PFWRLRj3NjLhCCgpRK4p0=
 github.com/pion/turn/v2 v2.1.3 h1:pYxTVWG2gpC97opdRc5IGsQ1lJ9O/IlNhkzj7MMrGAA=
 github.com/pion/turn/v2 v2.1.3/go.mod h1:huEpByKKHix2/b9kmTAM3YoX6MKP+/D//0ClgUYR2fY=
-github.com/pion/webrtc/v3 v3.2.20 h1:BQJiXQsJq9LgLp3op7rLy1y8d2WD+LtiS9cpY0uQ22A=
-github.com/pion/webrtc/v3 v3.2.20/go.mod h1:vVURQTBOG5BpWKOJz3nlr23NfTDeyKVmubRNqzQp+Tg=
+github.com/pion/webrtc/v3 v3.2.21 h1:c8fy5JcqJkAQBwwy3Sk9huQLTBUSqaggyRlv9Lnh2zY=
+github.com/pion/webrtc/v3 v3.2.21/go.mod h1:vVURQTBOG5BpWKOJz3nlr23NfTDeyKVmubRNqzQp+Tg=
 github.com/pkg/errors v0.9.1 h1:FEBLx1zS214owpjy7qsBeixbURkuhQAwrK5UwLGTwt4=
 github.com/pmezard/go-difflib v1.0.0 h1:4DBwDE0NGyQoBHbLQYPwSUPoCMWR5BEzIk/f1lZbAQM=
 github.com/pmezard/go-difflib v1.0.0/go.mod h1:iKH77koFhYxTK1pcRnkKkqfTogsbg7gZNVY4sRDYZ/4=