Bump protobuf-java from 3.21.2 to 3.21.7 in /producer_proto

[dependabot[bot]]

Bumps protobuf-java from 3.21.2 to 3.21.7.

Commits

• 54489e9 Updating changelog
• 5fc03e1 Updating version.json and repo version numbers to: 21.7
• a3888f5 Clean up TextFormat parser (#10673)
• 3b5301c Refactoring Java parsing (21.x) (#10665)
• bea6726 Merge pull request #10579 from protocolbuffers/21.x-202209142140
• b1924e1 Update version.json to: 21.7-dev
• 929e13d Merge pull request #10572 from deannagarcia/21.x
• de7597e Update python/release.sh to handle delay between twine upload and pip install...
• 480bd3b Merge pull request #10557 from protocolbuffers/21.x-202209132118
• aa8c73d Updating changelog
• Additional commits viewable in compare view

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