GitHub CI: Reinstate Toooba test for macos-13

Author: quark17

.github/workflows/build-and-test-macos.yml

@@ -190,7 +190,6 @@ jobs:
     name: "Test Toooba ${{ inputs.os }} ghc-${{ inputs.ghc_version }}"
     runs-on: ${{ inputs.os }}
     timeout-minutes: 60
-    if: ${{ inputs.os != 'macos-13' }}
     needs: build-macos
     steps:
       - uses: actions/checkout@v4