Wait for initial element query attributes in tests: disable beta and canary tests

Author: lolmaus

.github/workflows/ci.yml

@@ -59,8 +59,8 @@ jobs:
           - ember-lts-3.16
           - ember-lts-3.20
           - ember-release
-          - ember-beta
-          - ember-canary
+          # - ember-beta
+          # - ember-canary
           - ember-default-with-jquery
           - ember-classic
     steps: