Setup redis only on ubuntu-latest

Author: rennokki

.github/workflows/run-tests.yml

@@ -29,6 +29,7 @@ jobs:
                 uses: supercharge/[email protected]
                 with:
                     redis-version: ${{ matrix.redis }}
+                if: ${{ matrix.os == 'ubuntu-latest' }}
 
             -   name: Cache dependencies
                 uses: actions/cache@v1