Update workflow actions

Author: PhilipMostert

.github/workflows/test-coverage.yaml

@@ -18,7 +18,7 @@ jobs:
       fail-fast: false
       matrix:
         config:
-          - {os: macOS-12, r: 'release'}
+          - {os: macOS-latest, r: 'release'}
           - {os: windows-latest, r: 'release'}
           - {os: ubuntu-latest, r: 'devel', http-user-agent: 'release'}
           - {os: ubuntu-latest, r: 'release'}