SWI-7167 Remove ubuntu-latest from Test PR WF (#236)

Author: ckoegel

.github/workflows/test-pr.yml

@@ -34,7 +34,7 @@ jobs:
     runs-on: ${{ matrix.os }}
     strategy:
       matrix:
-        os: [ windows-2019, windows-2022, ubuntu-22.04, ubuntu-24.04, ubuntu-latest ]
+        os: [ windows-2019, windows-2022, ubuntu-22.04, ubuntu-24.04 ]
         python-version: ['3.9', '3.10', '3.11', '3.12', '3.13']
       fail-fast: false
     env: