fix(deps): update module github.com/pion/webrtc/v3 to v3.2.21

[renovate[bot]]

This PR contains the following updates:

Package	Type	Update	Change
github.com/pion/webrtc/v3	require	patch	v3.2.17 -> v3.2.21

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Release Notes

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

### [`v3.2.21`](https://togithub.com/pion/webrtc/releases/tag/v3.2.21) [Compare Source](https://togithub.com/pion/webrtc/compare/v3.2.20...v3.2.21) #### Changelog - [`48303e5`](https://togithub.com/pion/webrtc/commit/48303e5) Fix DataChannel.handleOpen ### [`v3.2.20`](https://togithub.com/pion/webrtc/releases/tag/v3.2.20) [Compare Source](https://togithub.com/pion/webrtc/compare/v3.2.19...v3.2.20) #### Changelog - [`c785f25`](https://togithub.com/pion/webrtc/commit/c785f25) Fix leak in Simulcast probing ### [`v3.2.19`](https://togithub.com/pion/webrtc/releases/tag/v3.2.19) [Compare Source](https://togithub.com/pion/webrtc/compare/v3.2.18...v3.2.19) #### Changelog - [`e593588`](https://togithub.com/pion/webrtc/commit/e593588) Revert "Update module transport, srtp, ice and turn" - [`36dcdde`](https://togithub.com/pion/webrtc/commit/36dcdde) Generate answer to match group bundle in offer ### [`v3.2.18`](https://togithub.com/pion/webrtc/releases/tag/v3.2.18) [Compare Source](https://togithub.com/pion/webrtc/compare/v3.2.17...v3.2.18) #### Changelog - [`ea23dec`](https://togithub.com/pion/webrtc/commit/ea23dec) Update module transport, srtp, ice and turn - [`012f129`](https://togithub.com/pion/webrtc/commit/012f129) Update AUTHORS.txt - [`a778f6d`](https://togithub.com/pion/webrtc/commit/a778f6d) Update module github.com/pion/interceptor to v0.1.18 - [`20f8393`](https://togithub.com/pion/webrtc/commit/20f8393) Fix incorrect ice-lite comment - [`b501cb5`](https://togithub.com/pion/webrtc/commit/b501cb5) Update AUTHORS.txt - [`6fac880`](https://togithub.com/pion/webrtc/commit/6fac880) Update AUTHORS.txt - [`7998f1f`](https://togithub.com/pion/webrtc/commit/7998f1f) Update Pion deps - [`bcfa3cb`](https://togithub.com/pion/webrtc/commit/bcfa3cb) Update module golang.org/x/net to v0.14.0 - [`1390b16`](https://togithub.com/pion/webrtc/commit/1390b16) Fix typo 'Renegotation' across project

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