build: filter out .git folder for generation check

[rjl493456442]

Fix the lint error

go run build/ci.go check_generate
build/cache/protoc-27.1-linux-x86_64.zip is stale
downloading from https://github.com/protocolbuffers/protobuf/releases/download/v27.1/protoc-27.1-linux-x86_64.zip
10%...20%...30%...40%...50%...60%...70%...80%...90%...100%
build/cache/protoc-gen-go.v1.34.2.linux.amd64.tar.gz is stale
downloading from https://github.com/protocolbuffers/protobuf-go/releases/download/v1.34.2/protoc-gen-go.v1.34.2.linux.amd64.tar.gz
10%...20%...30%...40%...50%...60%...70%...80%...90%...100%
>>> /home/appveyor/.gvm/gos/go1.24.0/bin/go generate ./...
ci.go:404: File changed: .git/index
ci.go:407: One or more generated files were updated by running 'go generate ./...'
exit status 1
Command exited with code 1

[MariusVanDerWijden]

SGTM

[jwasinger]

Why would running go generate change .git/index? I thought this only contains manually staged changes.

[rjl493456442]

I think the default target is all folders, ./...

I don't understand why .git/index will be generated, to be honest.

But .git should be safe to excluded right? It's definitely not our generation target