.github/workflows/dist.yml: Use cbc 2.10.11 via sagemath/sage#38312

Author: Matthias Koeppe

.github/workflows/dist.yml

@@ -73,8 +73,8 @@ jobs:
     steps:
       - uses: actions/checkout@v4
         with:
-          repository:   sagemath/sage
-          ref:          develop
+          repository:   mkoeppe/sage
+          ref:          cbc-2.10.11
 
       - name: Set up QEMU
         if: runner.os == 'Linux' && matrix.arch != 'x86_64' && matrix.arch != 'i686'