chore(deps): bump ilammy/msvc-dev-cmd from 1.8.0 to 1.8.1 (#3021)

.github/workflows/ci.yml

diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index ac79718..de7aeeb 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -151,7 +151,7 @@
     # MSVC, but for now, this action works:
     - name: Prepare compiler environment for Windows 🐍 2.7
       if: matrix.python == 2.7 && runner.os == 'Windows'
-      uses: ilammy/msvc-dev-cmd@v1.8.0
+      uses: ilammy/msvc-dev-cmd@v1.8.1
       with:
         arch: x64
 
@@ -730,7 +730,7 @@
       uses: jwlawson/actions-setup-cmake@v1.9
 
     - name: Prepare MSVC
-      uses: ilammy/msvc-dev-cmd@v1.8.0
+      uses: ilammy/msvc-dev-cmd@v1.8.1
       with:
         arch: x86
 
@@ -776,7 +776,7 @@
       uses: jwlawson/actions-setup-cmake@v1.9
 
     - name: Prepare MSVC
-      uses: ilammy/msvc-dev-cmd@v1.8.0
+      uses: ilammy/msvc-dev-cmd@v1.8.1
       with:
         toolset: 14.0