ci(gha): change runner to ubuntu-latest

Signed-off-by: Abhilash Shetty <abhilash.shetty@datacore.com>

Author: abhilashshetty04

.github/workflows/ci.yaml

@@ -24,7 +24,7 @@ on:
 
 jobs:
   tests:
-    runs-on: ubuntu-20.04
+    runs-on: ubuntu-latest
     timeout-minutes: 120
     steps:
       - name: Checkout