Use matrix.image, and i686-msvc isn't split here

Author: cuviper

.github/workflows/ci.yml

@@ -194,7 +194,7 @@ jobs:
       # See issue https://github.com/rust-lang/rust/issues/137733 for more details.
       - name: Remove Windows SDK 10.0.26100.0
         shell: powershell
-        if: ${{ matrix.name == 'i686-msvc-1' || matrix.name == 'i686-msvc-2' || matrix.name == 'dist-i686-msvc' }}
+        if: ${{ matrix.image == 'i686-msvc' || matrix.image == 'dist-i686-msvc' }}
         run: |
           $kits = (Get-ItemProperty -path 'HKLM:\SOFTWARE\Microsoft\Windows Kits\Installed Roots').KitsRoot10
           $sdk_version = "10.0.26100.0"