fix: use ubuntu-latest as ci runner (#124)

Author: UlisesGascon

.github/workflows/ci.yml

@@ -12,7 +12,7 @@ jobs:
     permissions:
       checks: write  # for coverallsapp/github-action to create new checks
       contents: read  # for actions/checkout to fetch code
-    runs-on: ubuntu-20.04
+    runs-on: ubuntu-latest
     strategy:
       matrix:
         name: