Disable fail-fast in CI so we always get results for all versions

.github/workflows/test.yml

@@ -8,11 +8,11 @@ on:
     paths-ignore:
       - '**.md'
 
-
 jobs:
   test:
     runs-on: ubuntu-latest
     strategy:
+      fail-fast: false
       matrix:
         emacs_version:
           - 27.1