chore(deps): update dependency protocolbuffers/protobuf to v29.3

[renovate-bot]

This PR contains the following updates:

Package	Update	Change
protocolbuffers/protobuf	minor	v29.0 -> v29.3

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Release Notes

protocolbuffers/protobuf (protocolbuffers/protobuf)

v29.3: Protocol Buffers v29.3

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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)

v29.2: Protocol Buffers v29.2

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Announcements

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

C++

• Automated rollback of commit 23aada2. (#​19692) (protocolbuffers/protobuf@1772657)
• Remove unused / invalid C++ lazy repeated field code from OSS. (#​19682) (protocolbuffers/protobuf@3649f87)

Java

• Automated rollback of commit 23aada2. (#​19692) (protocolbuffers/protobuf@1772657)

Other

• Export environment variables so bazelisk picks them up (#​19690) (protocolbuffers/protobuf@8b9d76c)
• Pin staleness check to Bazel 7 (#​19689) (protocolbuffers/protobuf@a1c9b6a)
• Remove CMake downgrade workaround from Windows CI tests (#​19630) (protocolbuffers/protobuf@3a7bb4a)

v29.1: Protocol Buffers v29.1

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Announcements

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

Java

• Rename maven to protobuf_maven in MODULE.bazel (#​18641) (#​19477) (protocolbuffers/protobuf@ba6da44)

Kotlin

• Rename maven to protobuf_maven in MODULE.bazel (#​18641) (#​19477) (protocolbuffers/protobuf@ba6da44)

Python

• Revert "Remove deprecated service.py usages from test". For 29.x only (#​19434) (protocolbuffers/protobuf@5864b50)

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This change is 

[scotthart]

/gcbrun