Fix minor typo in qmk_install.sh for MSYS/MINGW64 detection

diff --git a/util/qmk_install.sh b/util/qmk_install.sh
index 5a1a38fce5b0b309d0fd08a56ae77bb53647a176..67be6f47781ffe3409bde86d0acd0aae38bf57a4 100755 (executable)
--- a/util/qmk_install.sh
+++ b/util/qmk_install.sh
@@ -10,7 +10,7 @@ case $(uname) in
        Linux)
                exec "${util_dir}/linux_install.sh"
        ;;
-       MSYS_NT*|MINGW_64*)
+       MSYS_NT*|MINGW64_NT*)
                exec "${util_dir}/msys2_install.sh"
        ;;
 esac