[ci] Specify version for dotnet-ef installation

Author: EricKwon94

.github/workflows/web-server-deploy.yml

@@ -55,7 +55,7 @@ jobs:
         reporter: dotnet-trx
 
     - name: Install EF Tool
-      run: dotnet tool install --global dotnet-ef
+      run: dotnet tool install --global dotnet-ef --version 9.*
 
     - name: Build migrations script
       run: dotnet ef migrations script        
@@ -89,4 +89,4 @@ jobs:
         context: ./WebServer
         file: ./WebServer/Host/Dockerfile
         tags: ${{ env.DOCKER_URL }}/${{ env.DOCKER_IMAGE_NAME }}:latest
-        push: true
+        push: true