Also try to build against Qt 6.5

Author: usiems

.github/workflows/build_latest.yml

@@ -15,7 +15,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        qt-version: [ '5.12.*', '5.15.*' ]
+        qt-version: [ '5.12.*', '5.15.*', '6.5.*' ]
         python-version: [ '3.12' ]
     runs-on: ubuntu-latest
     steps: