run apt update

Author: thecoder08

.github/workflows/build.yml

@@ -12,7 +12,7 @@ jobs:
         uses: actions/checkout@v4
 
       - name: Install kernel dependencies
-        run: sudo apt install mtools libssl-dev libelf-dev -y
+        run: sudo apt update ; sudo apt install mtools libssl-dev libelf-dev -y
 
       - name: Build Linux kernel
         run: ./buildlinux.sh