remove lucee 6 as it still fails

Author: lmajano

.github/workflows/tests.yml

@@ -18,7 +18,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        cfengine: [ "boxlang-cfml@1", "lucee@5", "lucee@6", "adobe@2021", "adobe@2023" ]
+        cfengine: [ "boxlang-cfml@1", "lucee@5", "adobe@2021", "adobe@2023" ]
         coldboxVersion: [ "^7.0.0" ]
         experimental: [ false ]
         # Experimental: ColdBox BE vs All Engines