ubuntu PPA: drop lunar, drop mantic, add oracular

Author: jwt27

.github/workflows/deploy.yml

@@ -22,7 +22,7 @@ jobs:
     if: needs.check.outputs.good == 'true'
     strategy:
       matrix:
-        ubuntu-version: [ bionic, focal, jammy, lunar, mantic, noble ]
+        ubuntu-version: [ bionic, focal, jammy, noble, oracular ]
 
     steps:
       - uses: actions/checkout@v3