gitlab-ci: Fix mismatched MSVC toolset version and CI job tag

In commit 1a0ca75f (ci: Add warning icons in GL pipelines, 2023-04-26,
v2.1.0-rc1~3^2~52^2) the MSVC toolset version was updated, but the
corresponding CI job tag was not.

.gitlab/ci/windows10.yml

@@ -29,7 +29,7 @@
   variables:
     VCVARSALL: "${VS160COMNTOOLS}\\..\\..\\VC\\Auxiliary\\Build\\vcvarsall.bat"
     VCVARSPLATFORM: "x64"
-    VCVARSVERSION: "14.28.29333"
+    VCVARSVERSION: "14.28.29333" # sync with msvc-* version tags below
 
 .cmake_build_windows: &cmake_build_windows
   extends:
@@ -108,7 +108,7 @@ build:windows_vs2019:
     - windows-x86_64
     - shell
     - vs2019
-    - msvc-19.25
+    - msvc-19.28  # sync with VCVARSVERSION above
     - large-memory
   extends:
     - .cmake_build_windows
@@ -129,7 +129,7 @@ test:windows_vs2019:
     - windows-x86_64
     - shell
     - vs2019
-    - msvc-19.25
+    - msvc-19.28  # sync with VCVARSVERSION above
     - cuda-rt
     - turing
   extends: