.github/workflows/dist.yml: Switch to passagemath/passagemath (which has updated normaliz to 3.10.4)

Author: mkoeppe

.github/workflows/dist.yml

@@ -71,8 +71,8 @@ jobs:
     steps:
       - uses: actions/checkout@v4
         with:
-          repository:   sagemath/sage
-          ref:          develop
+          repository:   passagemath/passagemath
+          ref:          main
 
       - uses: actions/download-artifact@v4
         with: