GitHub Actions: fix broken script

- build for x86/x64/arm64
 - fix run-cmake step
 - fix caching
 - add upload artifacts
 - update vcpkg commit

Signed-off-by: Lev Stipakov <lev@openvpn.net>

.github/workflows/msbuild.yml

@@ -1,34 +1,52 @@
-name: MSBuild
+name: Build
 
-on: [push]
-
-env:
-  SOLUTION_FILE_PATH: .
-  BUILD_CONFIGURATION: Release
-  buildDir: '${{ github.workspace }}/build'
+on: [push, pull_request]
 
 jobs:
-  build:
-    runs-on: windows-latest
+  msvc:
+    strategy:
+      matrix:
+        arch: [x86, amd64, amd64_arm64]
 
+    env:
+      VCPKG_ROOT: ${{ github.workspace }}/vcpkg
+      BUILD_CONFIGURATION: Release
+      buildDir: '${{ github.workspace }}/build'
+
+    runs-on: windows-latest
     steps:
     - uses: actions/checkout@v2
     - uses: lukka/get-cmake@latest
     - uses: ilammy/msvc-dev-cmd@v1
+      with:
+        arch: ${{ matrix.arch }}
 
     - name: Restore from cache and install vcpkg
       uses: lukka/run-vcpkg@v6
       with:
         setupOnly: true
-        vcpkgGitCommitId: '668f048edbadbd85db43084e6d93c6a45d262f5c'
+        vcpkgGitCommitId: 'd8d61c941c333a147edffdcbdc9964dc0c0962f5'
         additionalCachedPaths: ${{ env.buildDir }}/vcpkg_installed
+        appendedCacheKey: ${{ matrix.arch }}-${{ hashFiles( '**/vcpkg.json' ) }}
 
     - name: Run CMake with vcpkg.json manifest
-      uses: lukka/run-cmake@main
+      uses: lukka/run-cmake@v3
       env:
         VCPKG_OVERLAY_PORTS: '${{ github.workspace }}/deps/vcpkg-ports'
       with:
         useVcpkgToolchainFile: true
-        buildDirectory: '{{ env.buildDir }}'
+        buildDirectory: '${{ env.buildDir }}'
         buildWithCMake: true
         cmakeAppendedArgs: '-DCLI_OVPNDCOWIN=ON'
+        cmakeBuildType: ${{env.BUILD_CONFIGURATION}}
+
+    - uses: actions/upload-artifact@v2
+      with:
+        name: openvpn3-${{ matrix.arch }}
+        path: |
+            ${{ env.buildDir }}/**/*.exe
+            ${{ env.buildDir }}/**/*.dll
+            !${{ env.buildDir }}/test/ssl/**
+            !${{ env.buildDir }}/test/unittests/**
+            !${{ env.buildDir }}/CMakeFiles/**
+            !${{ env.buildDir }}/vcpkg_installed/**