Update manual-all-environments.yml

Sync with available GitHub-hosted runner labels:
https://docs.github.com/en/actions/using-jobs/choosing-the-runner-for-a-job#choosing-github-hosted-runners

Author: sormuras

.github/workflows/manual-all-environments.yml

@@ -8,7 +8,8 @@ jobs:
       fail-fast: false
       max-parallel: 3
       matrix:
-        os: [ ubuntu-latest, ubuntu-18.04, macos-latest, macos-10.15, windows-latest, windows-2022, windows-2019 ]
+        # https://docs.github.com/en/actions/using-jobs/choosing-the-runner-for-a-job#choosing-github-hosted-runners
+        os: [ ubuntu-latest, ubuntu-20.04, macos-latest, macos-13, macos-13, macos-11, windows-latest, windows-2019 ]
     runs-on: ${{ matrix.os }}
     steps:
       - name: 'Check out repository'