[Docs] Use HTTPS for qmk.fm link (#5506)

* Use HTTPS for qmk.fm link

* Fix the rest of the HTTP links

readme.md

@@ -7,7 +7,7 @@
 [![GitHub contributors](https://img.shields.io/github/contributors/qmk/qmk_firmware.svg)](https://github.com/qmk/qmk_firmware/pulse/monthly)
 [![GitHub forks](https://img.shields.io/github/forks/qmk/qmk_firmware.svg?style=social&label=Fork)](https://github.com/qmk/qmk_firmware/)
 
-This is a keyboard firmware based on the [tmk\_keyboard firmware](http://github.com/tmk/tmk_keyboard) with some useful features for Atmel AVR and ARM controllers, and more specifically, the [OLKB product line](https://olkb.com), the [ErgoDox EZ](http://www.ergodox-ez.com) keyboard, and the [Clueboard product line](http://clueboard.co/).
+This is a keyboard firmware based on the [tmk\_keyboard firmware](https://github.com/tmk/tmk_keyboard) with some useful features for Atmel AVR and ARM controllers, and more specifically, the [OLKB product line](https://olkb.com), the [ErgoDox EZ](https://ergodox-ez.com) keyboard, and the [Clueboard product line](https://clueboard.co).
 
 ## Documentation
 
@@ -30,6 +30,6 @@ The project also includes community support for [lots of other keyboards](/keybo
 
 QMK is developed and maintained by Jack Humbert of OLKB with contributions from the community, and of course, [Hasu](https://github.com/tmk). The OLKB product firmwares are maintained by [Jack Humbert](https://github.com/jackhumbert), the Ergodox EZ by [Erez Zukerman](https://github.com/ezuk), the Clueboard by [Zach White](https://github.com/skullydazed), and the Atreus by [Phil Hagelberg](https://github.com/technomancy).
 
-## Official website
+## Official Website
 
-[http://qmk.fm](http://qmk.fm) is the official website of QMK, where you can find links to this page, the documentation, and the keyboards supported by QMK.
+[qmk.fm](https://qmk.fm) is the official website of QMK, where you can find links to this page, the documentation, and the keyboards supported by QMK.