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

[renovate[bot]]

This PR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
github.com/pion/webrtc/v3	v3.3.4 -> v4.0.1

---

Release Notes

pion/webrtc (github.com/pion/webrtc/v3)

v4.0.1

Compare Source

What's Changed

• Add SetFireOnTrackBeforeFirstRTP by @​edaniels in https://github.com/pion/webrtc/pull/2933

Full Changelog: https://github.com/pion/webrtc/compare/v4.0.0...v4.0.1

v4.0.0

Compare Source

Changelog

• 3f1622a Add v4 Release Notes to README
• bb41f23 Don't use JitterBuffer in SampleBuilder
• dc1f8ff Add ice transport api to get selected pair stats

---

Configuration

📅 Schedule: Branch creation - At any time (no schedule defined), Automerge - At any time (no schedule defined).

🚦 Automerge: Disabled by config. Please merge this manually once you are satisfied.

♻ Rebasing: Whenever PR becomes conflicted, or you tick the rebase/retry checkbox.

🔕 Ignore: Close this PR and you won't be reminded about this update again.

---

• [ ] If you want to rebase/retry this PR, check this box

---

This PR was generated by Mend Renovate. View the repository job log.