Ci: Fix ci for another new machine

.forgejo/workflows/demo.yaml

@@ -3,21 +3,11 @@ on: [push, pull_request]
 
 jobs:
   build-and-test:
-    runs-on: ubuntu-20.04
-    
-    container:
-      image: rust:alpine
+    runs-on: ubuntu-latest
     
     steps:
-      - name: Install Git
-        run: apk add --no-cache git
-
     - name: Checkout code
-        env:
-          REPO_TOKEN: ${{ secrets.CHECKOUT_TOKEN }}
-        run: |
-          git clone https://oauth2:${{ env.REPO_TOKEN }}@git.rustprogersteam.ru/${{ github.repository }}.git .
-          git checkout ${{ github.sha }}
+      uses: actions/checkout@v4
       
     - name: Build
       run: cargo build --verbose