fix: Updated protobuf dependency to latest.

[rajeshvelicheti]

Description

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Fixes #<issue_number_goes_here> 🦕

[rajeshvelicheti]

========================================================================================== tests coverage ===========================================================================================
_________________________________________________________________________ coverage: platform linux, python 3.10.16-final-0 __________________________________________________________________________

Name Stmts Miss Branch BrPart Cover

src/a2a/auth/user.py 8 0 0 0 100%
src/a2a/client/client.py 84 4 20 4 92%
src/a2a/client/errors.py 10 0 0 0 100%
src/a2a/client/grpc_client.py 37 27 12 0 20%
src/a2a/client/helpers.py 2 0 0 0 100%
src/a2a/server/agent_execution/agent_executor.py 1 0 0 0 100%
src/a2a/server/agent_execution/context.py 67 4 28 6 89%
src/a2a/server/agent_execution/request_context_builder.py 1 0 0 0 100%
src/a2a/server/agent_execution/simple_request_context_builder.py 10 0 2 0 100%
src/a2a/server/apps/jsonrpc/fastapi_app.py 17 2 2 0 89%
src/a2a/server/apps/jsonrpc/jsonrpc_app.py 102 8 28 6 89%
src/a2a/server/apps/jsonrpc/starlette_app.py 15 0 4 0 100%
src/a2a/server/context.py 5 0 0 0 100%
src/a2a/server/events/event_consumer.py 47 2 10 1 95%
src/a2a/server/events/event_queue.py 61 1 18 2 96%
src/a2a/server/events/in_memory_queue_manager.py 33 0 10 0 100%
src/a2a/server/events/queue_manager.py 3 0 0 0 100%
src/a2a/server/request_handlers/default_request_handler.py 141 0 52 1 99%
src/a2a/server/request_handlers/grpc_handler.py 107 41 30 5 58%
src/a2a/server/request_handlers/jsonrpc_handler.py 54 2 8 2 94%
src/a2a/server/request_handlers/request_handler.py 1 0 0 0 100%
src/a2a/server/request_handlers/response_helpers.py 15 0 4 0 100%
src/a2a/server/tasks/inmemory_push_notifier.py 27 0 4 1 97%
src/a2a/server/tasks/inmemory_task_store.py 25 0 4 0 100%
src/a2a/server/tasks/push_notifier.py 1 0 0 0 100%
src/a2a/server/tasks/result_aggregator.py 38 0 16 0 100%
src/a2a/server/tasks/task_manager.py 82 7 34 5 88%
src/a2a/server/tasks/task_store.py 1 0 0 0 100%
src/a2a/server/tasks/task_updater.py 24 0 2 0 100%
src/a2a/types.py 570 0 0 0 100%
src/a2a/utils/artifact.py 6 0 0 0 100%
src/a2a/utils/errors.py 8 0 0 0 100%
src/a2a/utils/helpers.py 62 3 24 2 94%
src/a2a/utils/message.py 8 1 0 0 88%
src/a2a/utils/proto_utils.py 299 82 114 18 67%
src/a2a/utils/task.py 6 0 2 0 100%
src/a2a/utils/telemetry.py 76 4 18 1 93%

TOTAL 2054 188 446 54 88%
Coverage XML written to file coverage.xml
================================================================================== 403 passed, 5 warnings in 5.50s ==================================================================================