build(deps): bump github.com/pion/webrtc/v3 from 3.2.20 to 3.2.21 (#2414)

Bumps [github.com/pion/webrtc/v3](https://github.com/pion/webrtc) from 3.2.20 to 3.2.21.
- [Release notes](https://github.com/pion/webrtc/releases)
- [Changelog](https://github.com/pion/webrtc/blob/master/.goreleaser.yml)
- [Commits](https://github.com/pion/webrtc/compare/v3.2.20...v3.2.21)

---
updated-dependencies:
- dependency-name: github.com/pion/webrtc/v3
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

go.mod

@@ -23,7 +23,7 @@ require (
 	github.com/pion/rtcp v1.2.10
 	github.com/pion/rtp v1.8.2
 	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
 	golang.org/x/crypto v0.13.0
 	golang.org/x/term v0.12.0

go.sum

@@ -156,8 +156,8 @@ github.com/pion/transport/v3 v3.0.1 h1:gDTlPJwROfSfz6QfSi0ZmeCSkFcnWWiiR9ES0ouAN
 github.com/pion/transport/v3 v3.0.1/go.mod h1:UY7kiITrlMv7/IKgd5eTUcaahZx5oUN3l9SzK5f5xE0=
 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/profile v1.4.0/go.mod h1:NWz/XGvpEW1FyYQ7fCx4dqYBLlfTcE+A9FLAkNKqjFE=
 github.com/pmezard/go-difflib v1.0.0 h1:4DBwDE0NGyQoBHbLQYPwSUPoCMWR5BEzIk/f1lZbAQM=
 github.com/pmezard/go-difflib v1.0.0/go.mod h1:iKH77koFhYxTK1pcRnkKkqfTogsbg7gZNVY4sRDYZ/4=