Update CI builders

- macos-13 removed as it's getting deprecated
- macos-26 added. It's in preview but let's try it out
- windows-11-arm and windows-2025 added. These are new and in principle
  we want to support them too

Author: MiloszKosobuckiKDAB

.github/workflows/build.yml

@@ -47,10 +47,12 @@ jobs:
           - ubuntu-24.04
           - ubuntu-22.04
           - ubuntu-24.04-arm
+          - windows-11-arm
           - windows-2022
-          - macos-13
+          - windows-2025
           - macos-14
           - macos-15
+          - macos-26
         build_type:
           - Debug
           - Release