(Temporarily) disable Mingw-w64 5.4.0 quickchecks

CI is failing to install the Mingw-w64 toolchain due to sourceforge.net
returning (403) Forbidden. Other versions work fine.
This commits (temporarily) disables Mingw-w64 5.4.0.

Signed-off-by: Matthias J. Kannwischer <matthias@kannwischer.eu>

Author: mkannwischer

.github/workflows/base.yml

@@ -187,7 +187,8 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        mingw-version: [5.4.0, 11.2.0, 12.2.0, 13.2.0, 14.2.0, 15.2.0]
+        # TODO: re-enable 5.4.0 or other old version
+        mingw-version: [11.2.0, 12.2.0, 13.2.0, 14.2.0, 15.2.0]
     name: Quickcheck (Mingw-w64 ${{ matrix.mingw-version }})
     runs-on: windows-latest
     steps: