ci mingw: follow a package name change (#1286)
ci mingw: follow a package name change (#1286)

Because pactoys-git renamed in upstream at the following commit.
https://github.com/msys2/MSYS2-packages/commit/0235754b07cbf708d28841aa59c0eddbe5ddd7a7#diff-27400a81bc42a425824029a2cf68650fea9de0875c5fb0c7c4b53ccd8665b9d7
komainu8/groonga,kenhys/groonga,komainu8/groonga,komainu8/groonga,komainu8/groonga,kenhys/groonga,groonga/groonga,komainu8/groonga,kenhys/groonga,groonga/groonga,kenhys/groonga,komainu8/groonga,komainu8/groonga,groonga/groonga,groonga/groonga,komainu8/groonga,groonga/groonga,kenhys/groonga,kenhys/groonga,groonga/groonga,kenhys/groonga,kenhys/groonga,groonga/groonga,groonga/groonga