fix(deps): update module maunium.net/go/mautrix to v0.21.0

[renovate]

This PR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
maunium.net/go/mautrix	v0.19.0 -> v0.21.0

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Release Notes

mautrix/go (maunium.net/go/mautrix)

v0.21.0

Compare Source

• Breaking change (client) Dropped support for unauthenticated media.
  Matrix v1.11 support is now required from the homeserver, although it's not
  enforced using /versions as some servers don't advertise it.
• (bridgev2) Added more features and fixed bugs.
• (appservice,crypto) Added support for using MSC3202 for appservice
  encryption.
• (crypto/olm) Made everything into an interface to allow side-by-side
  testing of libolm and goolm, as well as potentially support vodozemac
  in the future.
• (client) Fixed requests being retried even after context is canceled.
• (client) Added option to move /sync request logs to trace level.
• (error) Added Write and WithMessage helpers to RespError to make it
  easier to use on servers.
• (event) Fixed org.matrix.msc1767.audio field allowing omitting the
  duration and waveform.
• (id) Changed MatrixURI methods to not panic if the receiver is nil.
• (federation) Added limit to response size when fetching .well-known files.

v0.20.0

Compare Source

• Bumped minimum Go version to 1.22.
• (bridgev2) Added more features and fixed bugs.
• (event) Added types for MSC4144: Per-message profiles.
• (federation) Added implementation of server name resolution and a basic
  client for making federation requests.
• (crypto/ssss) Changed recovery key/passphrase verify functions to take the
  key ID as a parameter to ensure it's correctly set even if the key metadata
  wasn't fetched via GetKeyData.
• (format/mdext) Added goldmark extensions for single-character bold, italic
  and strikethrough parsing (as in *foo* -> foo, _foo_ -> foo and
  ~foo~ -> foo)
• (format) Changed RenderMarkdown et al to always include m.mentions in
  returned content. The mention list is filled with matrix.to URLs from the
  input by default.

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[renovate]

ℹ Artifact update notice

File name: go.mod

In order to perform the update(s) described in the table above, Renovate ran the go get command, which resulted in the following additional change(s):

• 7 additional dependencies were updated
• The go directive was updated for compatibility reasons

Details:

Package	Change
go	1.22.6 -> 1.23.1
go.mau.fi/util	v0.6.0 -> v0.8.0
golang.org/x/exp	v0.0.0-20240719175910-8a7402abbf56 -> v0.0.0-20240909161429-701f63a606c0
github.com/tidwall/gjson	v1.17.1 -> v1.17.3
golang.org/x/crypto	v0.25.0 -> v0.27.0
golang.org/x/net	v0.27.0 -> v0.29.0
golang.org/x/sys	v0.22.0 -> v0.25.0
golang.org/x/text	v0.16.0 -> v0.18.0