chore: upgrade to go1.21.9 (#1548) #3840

	# Runs unit and integration tests for our fundamental networking library.
	name: netxlite
	on:
	# Because we link libc explicitly for getaddrinfo, we SHOULD run
	# these checks for every PR to ensure we still compile.
	pull_request:
	push:
	branches:
	- "master"
	- "release/**"
	- "fullbuild"

	jobs:
	test_netxlite_package:
	runs-on: "${{ matrix.os }}"
	strategy:
	matrix:
	os: [ "ubuntu-22.04", "windows-2022", "macos-12" ]
	steps:

	- uses: actions/checkout@v3

	- name: Get GOVERSION content
	id: goversion
	run: echo "version=$(cat GOVERSION)" >> "$GITHUB_OUTPUT"
	shell: bash

	- uses: magnetikonline/action-golang-cache@v4
	with:
	go-version: "${{ steps.goversion.outputs.version }}"
	cache-key-suffix: "-coverage-${{ steps.goversion.outputs.version }}"

	# The first test compiles and links against libc and uses getaddrinfo
	- run: go test -race ./internal/netxlite/...

	# The second test instead uses netgo (we can't use -race with CGO_ENABLED=0)
	- run: go test ./internal/netxlite/...
	env:
	CGO_ENABLED: 0

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