Try CI on nightly, and see if the bug (from 1.11) is still present on nightly

Author: DilumAluthge

.github/workflows/ci.yml

@@ -50,7 +50,7 @@ jobs:
           # - '1.9' # TODO: uncomment this line once we fix the tests on 1.9
           - '1.10' # current LTS
           - '1.11'
-          # - 'nightly' # TODO: decide whether we want to run any CI jobs on nightly.
+          - 'nightly' # TODO: decide whether we want to run any CI jobs on nightly.
         julia-arch:
           - 'x64' # 32-bit Julia
           - 'x86' # 64-bit Julia