dont fail fast on matrix tests

Failing fast makes it difficult to diagnose the subset of the matrix
that is failing beyond the first job that fails

Author: stefanpenner

.github/workflows/ci-build.yml

@@ -43,7 +43,6 @@ jobs:
     needs: test
 
     strategy:
-      fail-fast: true
       matrix:
         ember-try-scenario:
           - ember-lts-3.20