try other workflow

Author: craff

.github/workflows/main.yml

@@ -11,7 +11,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        os: [ubuntu-latest, macos-latest]
+        os: [ubuntu-22.04, macos-latest]
         arch: [x64, arm64]
         ocaml-compiler:
           - 4.08