test: Added OpenTofu 1.11 to the test matrix.

Author: skyzyx

.github/workflows/test.yml

@@ -232,7 +232,7 @@ jobs:
           - "1.8"
           - "1.9"
           - "1.10"
-          # - "1.11"
+          - "1.11"
 
     steps:
       - name: Harden Runner