Update .github/workflows/compile.yml

Upgraded Linux AVX512 to Ubuntu 24

Author: martindevans

.github/workflows/compile.yml

@@ -40,7 +40,7 @@ jobs:
             arch: x64
           - build: 'avx512'
             defines: '-DGGML_AVX512=ON'
-            os: ubuntu-20.04
+            os: ubuntu-24.04
             arch: x64
           - build: 'aarch64'
             defines: '-DGGML_NATIVE=OFF -DGGML_CPU_AARCH64=ON -DGGML_CPU_ARM_ARCH=armv8-a'