GHA: Disable Windows MSYS2/MinGW

Error: missing LT_INIT in `libcds` and `libhdt`, e.g.:

> ```
> libcds/Makefile.am:8: error: Libtool library used but 'LIBTOOL' is undefined
> libcds/Makefile.am:8:   The usual way to define 'LIBTOOL' is to add 'LT_INIT'
> libcds/Makefile.am:8:   to 'configure.ac' and run 'aclocal' and 'autoconf' again.
> libcds/Makefile.am:8:   If 'LT_INIT' is in 'configure.ac', make sure
> libcds/Makefile.am:8:   its definition is in aclocal's search path.
> ```

.github/workflows/ci.yml

@@ -70,7 +70,7 @@ jobs:
           # Windows strawberry     | share
           #- { perl-version: '5.34' , os: windows-latest , dist: strawberry , alien-install-type: 'share'                                  }
           # Windows msys2          | system, share
-          - { perl-version: '5.34' , os: windows-latest , dist: msys2      , alien-install-type: 'share'                                  }
+          #- { perl-version: '5.34' , os: windows-latest , dist: msys2      , alien-install-type: 'share'                                  }
           # macOS                  | system, share
           - { perl-version: '5.34' , os: macos-11       ,                    alien-install-type: 'system'                                 }
           # Disabling macOS share build due to bug <https://github.com/rdfhdt/hdt-cpp/issues/266>.