Update dotnet version from 8.0 to 9.0. #800

	name: Go

	on:
	push:
	branches:
	- master
	pull_request:
	branches:
	- master

	jobs:

	build:
	name: Build
	runs-on: ubuntu-latest
	steps:

	- name: Set up Go 1.x
	uses: actions/setup-go@v5.0.1
	with:
	go-version: 1.21.x
	id: go

	- name: Check out code into the Go module directory
	uses: actions/checkout@v4.1.7

	- name: Install kubebuilder
	# see kubebuilder book: https://book.kubebuilder.io/quick-start.html
	run: \|
	version="3.1.0"
	os=$(go env GOOS)
	arch=$(go env GOARCH)
	curl -L -o kubebuilder https://github.com/kubernetes-sigs/kubebuilder/releases/download/v${version}/kubebuilder_${os}_${arch}
	sudo chmod +x kubebuilder
	sudo mv kubebuilder /usr/local/

	- name: Get go dependencies
	run: \|
	go install -v ./...
	go install -v golang.org/x/lint/golint
	go install -v golang.org/x/tools/cmd/goimports

	- name: Check for format and lint issues
	run: \|
	# see https://github.com/golang/go/issues/24230
	fmtcode="$(gofmt -s -d -l .)"
	echo $fmtcode && test -z "$fmtcode"
	lintcode="$(golint ./...)"
	echo $lintcode && test -z "$lintcode"

	- name: Check imports
	run: goimports -l .

	- name: Build
	run: go build ./...

	- name: Vet
	run: make vet

	- name: Test
	run: make test

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