Nix dev cache: disable ARM linux builds for now

See #5789

Author: ceedubs

.github/workflows/nix-dev-cache.yaml

@@ -22,7 +22,7 @@ jobs:
       matrix:
         os:
           - ubuntu-24.04
-          - ubuntu-24.04-arm
+          # - ubuntu-24.04-arm https://github.com/unisonweb/unison/issues/5789
           - macos-13
           - macos-14
     steps: