Resume CI on Julia 1.11

Author: DilumAluthge

.github/workflows/ci.yml

@@ -49,7 +49,7 @@ jobs:
           - '1.6' # previous LTS
           # - '1.9' # TODO: uncomment this line once we fix the tests on 1.9
           - '1.10' # current LTS
-          # - '1.11' # TODO: uncomment this line once we fix the tests on 1.11
+          - '1.11'
           # - 'nightly' # TODO: decide whether we want to run any CI jobs on nightly.
         julia-arch:
           - 'x64' # 32-bit Julia