Update helloworld grpc generated file

[lucacome]

Updates python code generated by the protocol buffer compiler for helloworld.proto, using the latest version of protobuf.

This is achieved by running

python3 -m grpc_tools.protoc --proto_path=. --python_out=. --grpc_python_out=. helloworld.proto

as described in the README.

[codecov-commenter]

Codecov Report

Merging #3220 (6df6235) into main (fb6bbeb) will not change coverage.
The diff coverage is n/a.

❗ Current head 6df6235 differs from pull request most recent head f8fe777. Consider uploading reports for the commit f8fe777 to get more accurate results

@@           Coverage Diff           @@
##             main    #3220   +/-   ##
=======================================
  Coverage   52.52%   52.52%           
=======================================
  Files          58       58           
  Lines       16070    16070           
=======================================
  Hits         8441     8441           
  Misses       7351     7351           
  Partials      278      278           

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[tomasohaodha]

Can you please add more detail to the PR. "Regenerated hello world pb2" is not helpful to devs who do not already have context. Thanks.

[lucacome]

@tomasohaodha updated the description

[tomasohaodha]

@tomasohaodha updated the description

@lucacome Thanks!