ci: replace ubuntu20.04 with ubuntu 24.04

Signed-off-by: Carl Zhang <[email protected]>

Author: XinfengZhang

.github/workflows/ubuntu.yml

@@ -13,16 +13,16 @@ on:
 permissions: read-all
 
 jobs:
-  ubuntu-20-04:
-    runs-on: ubuntu-20.04
+  ubuntu-24-04:
+    runs-on: ubuntu-24.04
     steps:
     - name: checkout libva
-      uses: actions/checkout@v3
+      uses: actions/checkout@v4
       with:
         repository: intel/libva
         path: libva
     - name: checkout libva-utils
-      uses: actions/checkout@v3
+      uses: actions/checkout@v4
       with:
         path: libva-utils
     - name: install prerequisites