FIXME: ci: temp disable clang-18 due to one test failure

Author: scivision

.github/workflows/ci.yml

@@ -82,7 +82,9 @@ jobs:
 
     strategy:
       matrix:
-        clang-version: [17, 18]
+        clang-version: [17]
+
+# FIXME: clang-18 failed CFI_establish_string ERROR STOP expected: Hello  got
 
     env:
       CC: clang-${{ matrix.clang-version }}