Update CI workflows

Author: wravery

.github/workflows/macos.yml

@@ -9,7 +9,7 @@ jobs:
       matrix:
         config: [Debug, Release]
 
-    runs-on: macos-11
+    runs-on: macos-latest
 
     steps:
     - uses: actions/checkout@v2
@@ -31,7 +31,7 @@ jobs:
       shell: pwsh
       working-directory: build/
       run: |
-        $vcpkgToolchain = Join-Path $env:VCPKG_ROOT './scripts/buildsystems/vcpkg.cmake' -Resolve
+        $vcpkgToolchain = Join-Path $env:VCPKG_INSTALLATION_ROOT './scripts/buildsystems/vcpkg.cmake' -Resolve
         $cmakeBuildType = '${{ matrix.config }}'
 
         cmake "-DCMAKE_TOOLCHAIN_FILE=$vcpkgToolchain" "-DCMAKE_BUILD_TYPE=$cmakeBuildType" ${{ github.workspace }}

.github/workflows/windows.yml

@@ -38,7 +38,7 @@ jobs:
       shell: pwsh
       working-directory: build/
       run: |
-        $vcpkgToolchain = Join-Path $env:VCPKG_ROOT '.\scripts\buildsystems\vcpkg.cmake' -Resolve
+        $vcpkgToolchain = Join-Path $env:VCPKG_INSTALLATION_ROOT '.\scripts\buildsystems\vcpkg.cmake' -Resolve
         $vcpkgTriplet = '${{ steps.set-variables.outputs.vcpkg_triplet }}'
         $cmakeSharedLibs = $(if ('${{ matrix.libs }}' -eq 'shared') { 'ON' } else { 'OFF' })
         $msbuildArch = $(if ('${{ matrix.arch }}' -eq 'x64') { 'X64' } else { 'Win32' })