fix deprecated add-path on github actions windows workflow

.github/workflows/BuildSamplesWindows.yml

@@ -9,12 +9,12 @@ jobs:
 
     steps:
     - uses: actions/checkout@v2
-    - name: Downlaod Jom
+    - name: Download Jom
       run: |
         Invoke-WebRequest -Uri "http://download.qt.io/official_releases/jom/jom_1_1_3.zip" -OutFile "jom_1_1_3.zip"
         New-Item -Name "jom" -ItemType "directory"
         Expand-Archive -Path jom_1_1_3.zip -DestinationPath .\jom
-        echo "::add-path::$(Get-Location)\jom"
+        echo "$(Get-Location)\jom" >> GITHUB_PATH
     - name: Setup env variables
       id: envs
       run: |