github actions: Use the correct configs

The RT kernel uses different configs.

Author: gvrose8192

.github/workflows/push-check_aarch64.yml

@@ -28,6 +28,6 @@ jobs:
       - name: Build the Kernel
         run: |
           git config --global --add safe.directory /__w/kernel-src-git/kernel-src-git
-          cp configs/kernel-5.14.0-aarch64.config .config
+          cp configs/kernel-rt-5.14.0-aarch64-64k.config .config
           make olddefconfig
           make -j8

.github/workflows/push-check_x86_64.yml

@@ -28,6 +28,6 @@ jobs:
       - name: Build the Kernel
         run: |
           git config --global --add safe.directory /__w/kernel-src-git/kernel-src-git
-          cp configs/kernel-5.14.0-x86_64.config .config
+          cp configs/kernel-rt-5.14.0-x86_64.config .config
           make olddefconfig
           make -j8