ci: temporarily drop Julia 1.11 test lane

Author: 0xpantera

.github/workflows/ci-tests.yml

@@ -17,7 +17,7 @@ jobs:
       fail-fast: false
       matrix:
         os: [ubuntu-latest]
-        julia-version: ["1.11", "1.12"]
+        julia-version: ["1.12"]
 
     steps:
       - uses: actions/checkout@v4