Update grpc-netty, grpc-okhttp, grpc-stub, ... to 1.28.1

[scala-steward]

Updates

• io.grpc:grpc-netty
• io.grpc:grpc-okhttp
• io.grpc:grpc-stub
• io.grpc:grpc-testing

from 1.28.0 to 1.28.1.
GitHub Release Notes - Version Diff

I'll automatically update this PR to resolve conflicts as long as you don't change it yourself.

If you'd like to skip this version, you can just close this PR. If you have any feedback, just mention me in the comments below.

Have a fantastic day writing Scala!

Ignore future updates

Add this to your .scala-steward.conf file to ignore future updates of this dependency:

updates.ignore = [ { groupId = "io.grpc" } ]

labels: library-update, semver-patch

[codecov]

Codecov Report

Merging #865 into master will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##           master     #865   +/-   ##
=======================================
  Coverage   85.03%   85.03%           
=======================================
  Files          55       55           
  Lines         762      762           
  Branches        5        5           
=======================================
  Hits          648      648           
  Misses        114      114

---

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