Fix macOS CI

Author: michaelsproul

.github/workflows/test-suite.yml

@@ -24,6 +24,12 @@ jobs:
       matrix:
         os: [ubuntu-latest, macos-latest, windows-latest]
         features: ["", "ring", "zero_hash_cache", "ring,zero_hash_cache"]
+        # Skip the ring-less builds on macOS ARM where ring is mandatory.
+        exclude:
+        - os: macos-latest
+          features: ""
+        - os: macos-latest
+          features: "zero_hash_cache"
     runs-on: ${{ matrix.os }}
     name: test-${{ matrix.os }}-feat-${{ matrix.features }}
     steps: