Use HTTPS for downloading MSYS2

[Sudrien]

It appears https://repo.msys2.org is working with a Let's Encrypt cert.

D:\>ridk install
 _____       _           _____           _        _ _         ___
|  __ \     | |         |_   _|         | |      | | |       |__ \
| |__) |   _| |__  _   _  | |  _ __  ___| |_ __ _| | | ___ _ __ ) |
|  _  / | | | '_ \| | | | | | | '_ \/ __| __/ _` | | |/ _ \ '__/ /
| | \ \ |_| | |_) | |_| |_| |_| | | \__ \ || (_| | | |  __/ | / /_
|_|  \_\__,_|_.__/ \__, |_____|_| |_|___/\__\__,_|_|_|\___|_||____|
                    __/ |           _
                   |___/          _|_ _  __   | | o __  _| _     _
                                   | (_) |    |^| | | |(_|(_)\^/_>

   1 - MSYS2 base installation
   2 - MSYS2 system update (optional)
   3 - MSYS2 and MINGW development toolchain

Which components shall be installed? If unsure press ENTER [1,3] 1

MSYS2 seems to be unavailable
Download http://repo.msys2.org/distrib/x86_64/msys2-x86_64-20190524.exe
  to C:\Users\**************\AppData\Local\Temp/msys2-x86_64-20190524.exe
Downloading msys2-x86_64-20190524.exe (148%)
Verify integrity of msys2-x86_64-20190524.exe ... Failed

[Tesedenya]

Rubby system file

[larskanis]

Solved in commit https://github.com/oneclick/rubyinstaller2/commit/77e968ccf28ca95c268546f5ccf22ac3b21ad65b .