Update module google.golang.org/grpc to v1.39.0

[renovate]

This PR contains the following updates:

Package	Type	Update	Change
google.golang.org/grpc	require	minor	v1.38.0 -> v1.39.0

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Release Notes

grpc/grpc-go

v1.39.0

Compare Source

Behavior Changes

• csds: return empty response if xds client is not set (#​4505)
• metadata: convert keys to lowercase in FromContext() (#​4416)

New Features

• xds: add GetServiceInfo to GRPCServer (#​4507)
  • Special Thanks: @​amenzhinsky
• xds: add test-only injection of xds config to client and server (#​4476)
• server: allow PreparedMsgs to work for server streams (#​3480)
  • Special Thanks: @​eafzali

Performance Improvements

• transport: remove decodeState from client & server to reduce allocations (#​4423)
  • Special Thanks: @​JNProtzman

Bug Fixes

• server: return UNIMPLEMENTED on receipt of malformed method name (#​4464)
• xds/rds: use 100 as default weighted cluster totalWeight instead of 0 (#​4439)
  • Special Thanks: @​alpha-baby
• transport: unblock read throttling when controlbuf exits (#​4447)
• client: fix status code to return Unavailable for servers shutting down instead of Unknown (#​4561)

Documentation

• doc: fix broken benchmark dashboard link in README.md (#​4503)
  • Special Thanks: @​laststem
• example: improve hello world server with starting msg (#​4468)
  • Special Thanks: @​dkkb
• client: Clarify that WaitForReady will block for CONNECTING channels (#​4477)
  • Special Thanks: @​evanj

v1.38.1

Compare Source

internal/transport: do not mask ConnectionError (#​4561)

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