Fix htmlproofer error, EspressoBIN url -> https

Signed-off-by: Joachim Wiberg <troglobit@gmail.com>

Author: troglobit

_tabs/platforms.md

@@ -53,4 +53,4 @@ Infix boot sequence, and testing:
 [6]: https://doc-en.rvspace.org/VisionFive2/Landing_Page/VisionFive_2/introduction.html
 [7]: https://wiki.friendlyelec.com/wiki/index.php/NanoPi_R2S
 [8]: https://ww1.microchip.com/downloads/en/DeviceDoc/00002854B.pdf
-[9]: http://espressobin.net/
+[9]: https://espressobin.net/