Update build.yml

Author: prikolium-cfx

.github/workflows/build.yml

@@ -24,8 +24,14 @@ jobs:
           echo "$env:GITHUB_WORKSPACE\depot_tools" >> $GITHUB_PATH
           echo "$env:GITHUB_WORKSPACE\ninja" >> $GITHUB_PATH
 
+      - name: Prepare Depot
+        working-directory: ${{ github.workspace }}
+        run: |
+          cd .\build
+          .\prepare-depot.bat
+
       - name: Build CEF
         working-directory: ${{ github.workspace }}
         run: |
-          ls
-          .\build\build.bat
+          cd .\build
+          build.bat