Update links in welcome.md

Make the list of links to translated versions same full as in README.md and fix http -> https.
Literally just copied from updated README.md

Author: vladimirbalin

_includes/welcome.md

@@ -19,25 +19,26 @@ and examples as they become available.
 
 _PHP: The Right Way_ is translated into many different languages:
 
-* [English](http://www.phptherightway.com)
-* [Español](http://phpdevenezuela.github.io/php-the-right-way)
-* [Français](http://eilgin.github.io/php-the-right-way/)
-* [Indonesia](http://id.phptherightway.com)
-* [Italiano](http://it.phptherightway.com)
-* [Polski](http://pl.phptherightway.com)
-* [Português do Brasil](http://br.phptherightway.com)
+* [English](https://www.phptherightway.com)
+* [Deutsch](https://rwetzlmayr.github.io/php-the-right-way)
+* [Español](https://phpdevenezuela.github.io/php-the-right-way)
+* [Français](https://eilgin.github.io/php-the-right-way/)
+* [Indonesia](https://id.phptherightway.com)
+* [Italiano](https://it.phptherightway.com)
+* [Polski](https://pl.phptherightway.com)
+* [Português do Brasil](https://br.phptherightway.com)
 * [Română](https://bgui.github.io/php-the-right-way/)
-* [Slovenščina](http://sl.phptherightway.com)
-* [Srpski](http://phpsrbija.github.io/php-the-right-way/)
-* [Türkçe](http://hkulekci.github.io/php-the-right-way/)
-* [български](http://bg.phptherightway.com)
-* [Русский язык](http://getjump.github.io/ru-php-the-right-way)
-* [Українська](http://iflista.github.io/php-the-right-way/)
+* [Slovenščina](https://sl.phptherightway.com)
+* [Srpski](https://phpsrbija.github.io/php-the-right-way/)
+* [Türkçe](https://hkulekci.github.io/php-the-right-way/)
+* [български](https://bg.phptherightway.com)
+* [Русский язык](https://getjump.github.io/ru-php-the-right-way)
+* [Українська](https://iflista.github.io/php-the-right-way/)
 * [العربية](https://adaroobi.github.io/php-the-right-way/)
-* [فارسى](http://novid.github.io/php-the-right-way/)
+* [فارسى](https://novid.github.io/php-the-right-way/)
 * [ภาษาไทย](https://apzentral.github.io/php-the-right-way/)
-* [한국어판](http://modernpug.github.io/php-the-right-way)
-* [日本語](http://ja.phptherightway.com)
+* [한국어판](https://modernpug.github.io/php-the-right-way)
+* [日本語](https://ja.phptherightway.com)
 * [简体中文](https://laravel-china.github.io/php-the-right-way/)
 * [繁體中文](https://laravel-taiwan.github.io/php-the-right-way)