gitlab-ci: Reenable cmake:mingw

For some reason, it's working again.

.gitlab-ci.yml

@@ -154,11 +154,6 @@ cmake:linux:clang:static:
     CC: clang
     SUFFIX: linux-clang-static
 
-# cmake:mingw is currently broken for unknown reasons.
-#
-# Executing /mingw64/bin/cmake.exe with any arguments fails without error
-# message and exit code 127 since 2025-01-21.
-
 .cmake:mingw:
   tags:
     - win32-ps
@@ -189,8 +184,8 @@ cmake:mingw:w64-i686:shared:
 
 cmake:mingw:w64-i686:static:
   extends: .cmake:mingw
-  only:
-    - schedules
+#  only:
+#    - schedules
   variables:
     BUILD_SHARED_LIBS: "OFF"
     MSYSTEM: MINGW32
@@ -198,8 +193,8 @@ cmake:mingw:w64-i686:static:
 
 cmake:mingw:w64-x86_64:shared:
   extends: .cmake:mingw
-  only:
-    - schedules
+#  only:
+#    - schedules
   variables:
     BUILD_SHARED_LIBS: "ON"
     MSYSTEM: MINGW64