ci: test sha generation in pr

Author: benfdking

.github/actions/build-binaries/action.yml

@@ -42,8 +42,13 @@ runs:
         fi
         cd -
     - name: Generate SHA-256 and Save to File
-      run: shasum -a 256 ${{ matrix.platform.name }} > ${{ matrix.platform.name }}.sha256
       shell: bash
+      run: |
+        if command -v shasum >/dev/null 2>&1; then
+          shasum -a 256 "${{ matrix.platform.name }}" > "${{ matrix.platform.name }}.sha256"
+        else
+          sha256sum "${{ matrix.platform.name }}" > "${{ matrix.platform.name }}.sha256"
+        fi
     - name: Generate artifact attestation
       if: inputs.publish == 'true'
       uses: actions/attest-build-provenance@c074443f1aee8d4aeeae555aebba3282517141b2 # ratchet:actions/attest-build-provenance@v2