GHA: Update CI to use os: macos-latest

Connects to <PDLPorters/devops#46>.

Author: zmughal

.github/workflows/ci.yml

@@ -19,7 +19,6 @@ jobs:
   ci:
     runs-on: ${{ matrix.os }}
     if: ${{ github.event_name == 'push' || github.event_name == 'pull_request' }}
-    needs: notify
     strategy:
       fail-fast: false
       matrix:
@@ -34,7 +33,7 @@ jobs:
           #- perl-version: '5.30'
           #  os: windows-latest
           - perl-version: '5.30'
-            os: macos-11
+            os: macos-latest
     steps:
       - uses: actions/checkout@v2
       - name: 'ci-dist: target-setup-perl'