.github/workflows/rake.yml in metanorma-ribose-1.7.5 vs .github/workflows/rake.yml in metanorma-ribose-1.7.6

@@ -14,10 +14,10 @@
     runs-on: ${{ matrix.os }}
     continue-on-error: ${{ matrix.experimental }}
     strategy:
       fail-fast: false
       matrix:
-        ruby: [ '3.0', '2.7', '2.6', '2.5', '2.4' ]
+        ruby: [ '3.0', '2.7', '2.6', '2.5' ]
         os: [ ubuntu-latest, windows-latest, macos-latest ]
         experimental: [ false ]
     steps:
       - uses: actions/checkout@master