examples/grpc: fix go.mod

[doujiang24]

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[doujiang24]

Hello @phlax , this could fix #31294, hope it fix the error from dependabot-updater.
I haven't seen the error message from dependabot-updater, guess it complains an invalid go mod file.

[phlax]

yeah - lets see - i tried something similar - not sure why but then i ended up adding a go.sum file also - which didnt work

[phlax]

lgtm, thanks @doujiang24

[phlax]

@doujiang24 unfortunately this one didnt work - error is

  proxy | 2023/12/12 13:27:33 [405] GET https://proxy.golang.org:443/github.com/envoyproxy/envoy/@v/list
  proxy | 2023/12/12 13:27:33 [405] 200 https://proxy.golang.org:443/github.com/envoyproxy/envoy/@v/list
updater | 2023/12/12 13:27:33 INFO <job_761393423> Handled error whilst updating golang.org/x/net: dependency_file_not_resolvable {:message=>"github.com/envoyproxy/envoy/examples/grpc-bridge/server/kv: cannot find module providing package github.com/envoyproxy/envoy/examples/grpc-bridge/server/kv"}
updater | 2023/12/12 13:27:33 INFO <job_761393423> Finished job processing
updater | 2023/12/12 13:27:33 INFO Results:

https://github.com/envoyproxy/envoy/network/updates/761393423

[doujiang24]

oh, I'll take a look tomorrow.
https://github.com/envoyproxy/envoy/network/updates/761393423 is 404 on my side, might be lack of permission.