Disable macOS builds

Author: Gaël Deest

.github/workflows/main.yml

@@ -12,7 +12,7 @@ jobs:
     runs-on: ${{ matrix.os }}
     strategy:
       matrix:
-        os: [ubuntu-latest, macOS-latest]
+        os: [ubuntu-latest]
         cabal: ["3.2"]
         ghc:
           - "8.8.4"