Install libelf-dev

Author: andrewmcwatters

.github/workflows/makefile.yml

@@ -36,7 +36,9 @@ jobs:
         make mrproper
 
     - name: Install libelf-dev
-      run: sudo apt-get install -y libelf-dev
+      run: |
+        sudo apt-get update
+        sudo apt-get install -y libelf-dev
 
     # https://docs.kernel.org/admin-guide/README.html#build-directory-for-the-kernel
     - name: Configure and build the kernel