fix(ci): 404 Not Found in https://luajit.org/download/LuaJIT-2.0.5.tar.gz

> LuaJIT uses rolling releases. There are no release tarballs available for download.
>
> Please do not use obsolete versions from older tarballs or zip files. Please remove any outdated links to these downloads — these links will cease to work soon.
>
> https://luajit.org/download.html

Author: gretmn102

.github/workflows/CI.yml

@@ -41,9 +41,9 @@ jobs:
         run: |
           mkdir libs winlibs
 
-          wget https://luajit.org/download/LuaJIT-${{ env.luajit_ver }}.tar.gz
-          tar xf LuaJIT-${{ env.luajit_ver }}.tar.gz
-          cd LuaJIT-${{ env.luajit_ver }}
+          git clone https://luajit.org/git/luajit.git
+          cd luajit
+          git switch --detach tags/v${{ env.luajit_ver }}
           make CROSS=i686-w64-mingw32- HOST_CC="gcc -m32" TARGET_SYS=Windows BUILDMODE=static
           for f in lua.h luaconf.h lualib.h lauxlib.h; do
               cp src/$f ../winlibs/