ci: make mold the default linker on Linux runner (ci workflow)

I forgot to update this workflow too

Author: 0x192

.github/workflows/ci.yml

@@ -41,8 +41,6 @@ jobs:
     steps:
       - uses: actions/checkout@v3
       - uses: rui314/setup-mold@v1 # faster linker
-        with:
-          make-default: false
       - uses: actions/cache@v3
         with:
           path: |