github actions: build-check: Use unversioned config

LE-2787

These are the configs synced from the corresponding dist-git

Author: bmastbergen

.github/workflows/build-check_x86_64.yml

@@ -29,6 +29,6 @@ jobs:
       - name: Build the Kernel
         run: |
           git config --global --add safe.directory /__w/kernel-src-tree/kernel-src-tree
-          cp configs/kernel-4.18.0-x86_64.config .config
+          cp configs/kernel-x86_64.config .config
           make olddefconfig
           make -j8