github-latest-version-file.php

$user = "lsdplugins";
$repo = "lsddonation-mynotif";
$api = " https://api.github.com/repos/$user/$repo/releases";

$headers = [
	'Accept' => 'application/vnd.github.v3+json',
];

$payload = [
	'timeout'   => 30,
	'headers'   => $headers,
	'sslverify' => false,
];

$request  = wp_remote_get($api, $payload);
$response = json_decode(wp_remote_retrieve_body($request));
$github_latest_version = (string) $response[0]->tag_name; // 1.0.0
$github_latest_zip = array_column($response, 'zipball_url')[0]; // https://api.github.com/repos/lsdplugins/lsddonation-mynotif/zipball/1.1.0

var_dump( $github_latest_version, $github_latest_zip );