fixup! ci: run Scalar's Functional Tests

Switch from `windows-2019` to `windows-2022` as the former has been
retired: actions/runner-images#12045.

Signed-off-by: Johannes Schindelin <[email protected]>

Author: dscho

.github/workflows/scalar-functional-tests.yml

@@ -20,7 +20,7 @@ jobs:
       fail-fast: false
       matrix:
         # Order by runtime (in descending order)
-        os: [windows-2019, macos-13, ubuntu-22.04]
+        os: [windows-2022, macos-13, ubuntu-22.04]
         # Scalar.NET used to be tested using `features: [false, experimental]`
         # But currently, Scalar/C ignores `feature.scalar` altogether, so let's
         # save some electrons and run only one of them...