Update protobuf-java to 4.26.0

[xerial-bot]

About this PR

📦 Updates com.google.protobuf:protobuf-java from 3.25.3 to 4.26.0 ⚠

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^{labels: library-update}

[xerial]

Protobuf introduced breaking changes, which is still discussed in grpc-java https://github.com/grpc/grpc-java/issues/11015

[xerial-bot]

Superseded by #3467.