When *upgrading* your Go version to latest, use this script to download the latest version for your distro & arch. (This script assumes you already have Go installed.)

getLatestGo.sh

#!/usr/bin/env bash

# source: https://gist.github.com/808codist/fe5c8d2118afc1a05ed11d6b86da92b3

set -o errexit # exit on 1st error
set -o nounset # referencing unset vars is an error

dlUrl='https://go.dev/dl/'
allVersionsUrl="$dlUrl?mode=json"
osArch="$(go env GOHOSTOS)-$(go env GOARCH)"
dlProperties=/tmp/goVersionDownloadProperties.txt

# get all versions and search for 1st line with $osArch plus 6 lines after
# (assuming 1st == latest)
curl -s "$allVersionsUrl" | grep -m 1 -A 6 "$osArch" > $dlProperties

# for all lines, '    "foo": "bar",' --> 'foo="bar"'
sed -i 's/[[:space:]]//g' $dlProperties # rm spaces
sed -i 's/^"//' $dlProperties           # rm starting quote
sed -i 's/":/=/' $dlProperties          # ": --> =
sed -i 's/,$//' $dlProperties           # rm any trailing comma

# shellcheck disable=SC1090
. $dlProperties # set filename and sha256 variables (among others)
rm -f "${filename:?}" # rm any tar ball
echo "SHA256 ($filename) = ${sha256:?}" > "/tmp/$filename.sum" # create checksum file
wget "$dlUrl/$filename" # download the tar ball

# verify check sum
sha256sum -c "/tmp/$filename.sum" && \
    echo "to install run:" && \
    echo "	sudo rm -rf /usr/local/go && sudo tar -C /usr/local -xzf ${filename}"