ci: Build against both asan and ubsan Qt

The KDReports asan preset already enables both for KDReports itself.
Now the Qt it builds against also has both.

Author: iamsergio

.github/workflows/build-sanitizers.yml

@@ -23,7 +23,7 @@ jobs:
         preset: ['dev-asan']
         include:
           - preset: dev-asan
-            qt-flavor: asan
+            qt-flavor: asan_ubsan
     steps:
       - name: Checkout sources
         uses: actions/checkout@v4