chore(deps): update protobuf to v29.3

[renovate-bot]

This PR contains the following updates:

Package	Type	Update	Change
com_google_protobuf	http_archive	minor	v29.2 -> v29.3
protobuf	bazel_dep	minor	29.2 -> 29.3
protocolbuffers/protobuf		minor	v29.2 -> v29.3

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Release Notes

protocolbuffers/protobuf (com_google_protobuf)

v29.3: Protocol Buffers v29.3

Compare Source

Announcements

• Protobuf News may include additional announcements or pre-announcements for upcoming changes.

C++

• Fix cmake installation location of java and go features (#​19773) (protocolbuffers/protobuf@1dc5842)

Other

• Add .bazeliskrc for protobuf repo to tell bazelisk to use 7.1.2 by default. (#​19884) (protocolbuffers/protobuf@9a5d2c3)
• Update artifact actions to v4 (#​19703) (protocolbuffers/protobuf@8e7e6b0)

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This change is 

[dpebot]

/gcbrun