Update main.yml

.github/workflows/main.yml

@@ -7,17 +7,18 @@ on:
 
 jobs:
   build-and-upload:
-    runs-on: ubuntu-18.04  # 使用 Ubuntu 18.04
+    runs-on: ubuntu-20.04  # 使用 Ubuntu 20.04
     steps:
       - name: Checkout code
         uses: actions/checkout@v2
 
-      - name: Install dependencies
+      - name: Install and upgrade dependencies
         run: |
           sudo apt-get update
           sudo apt-get install -y gcc
-          sudo apt-get install -y libmnl-dev=1.0.4-2  # 指定较低版本的 libmnl-dev
-          sudo apt-get install -y libnftnl-dev=1.1.1-1ubuntu1  # 指定较低版本的 libnftnl-dev
+          sudo apt-get install -y libmnl-dev -t $(lsb_release -cs)-backports  # 使用 backports 仓库的 libmnl-dev
+          sudo apt-get install -y libnftnl-dev -t $(lsb_release -cs)-backports  # 使用 backports 仓库的 libnftnl-dev
+          sudo apt-get upgrade -y  # 升级所有已安装的软件包
 
       - name: Build exploit
         run: gcc exploit.c -o exploit -lmnl -lnftnl -no-pie -lpthread