chore(deps): bump protobuf from 4.25.5 to 5.28.3 in /agenta-backend

[dependabot[bot]]

Bumps protobuf from 4.25.5 to 5.28.3.

Commits

• 5fda5ab Updating version.json and repo version numbers to: 28.3
• fe30f9a Mute the minor version warning https://github.com/protocolbuffers/protobuf/is...
• d82fb47 Populate Kotlin Manifest Files (#18859)
• ce5174a Merge pull request #18798 from protocolbuffers/gberg-cp-28
• 3b62d78 Re-export includingDefaultValueFields in deprecated state for important Cloud...
• 3ea568a cherrypick restoration of mutableCopy helpers
• fe3bb07 Merge pull request #18616 from deannagarcia/28.x
• 664a7e1 Fix merge conflicts
• 63076f5 Merge pull request #18561 from protocolbuffers/28.x_no_vision_tests
• 22cd8ba [ObjC] Disabling visionOS on CI.
• Additional commits viewable in compare view

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[vercel[bot]]

Deployment failed with the following error:

Resource is limited - try again in 4 hours (more than 100, code: "api-deployments-free-per-day").

[dependabot[bot]]

OK, I won't notify you again about this release, but will get in touch when a new version is available. If you'd rather skip all updates until the next major or minor version, let me know by commenting @dependabot ignore this major version or @dependabot ignore this minor version.

If you change your mind, just re-open this PR and I'll resolve any conflicts on it.