Stop running CI on windows-2019

There are scheduled brownouts for this runner image.  Replace it with `windows-2025`, and start running on `macos-15` too.

Author: henrymercer

.github/workflows/codeql.yml

@@ -75,7 +75,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        os: [ubuntu-22.04,ubuntu-24.04,windows-2019,windows-2022,macos-13,macos-14]
+        os: [ubuntu-22.04,ubuntu-24.04,windows-2022,windows-2025,macos-13,macos-14,macos-15]
         tools: ${{ fromJson(needs.check-codeql-versions.outputs.versions) }}
     runs-on: ${{ matrix.os }}