fix ci

Author: zth

.github/workflows/build-release.yml

@@ -102,7 +102,7 @@ jobs:
       matrix:
         target:
           - target: x86_64-unknown-linux-gnu
-            os: Ubuntu-20.04
+            os: ubuntu-latest
             build-name: relay
             artifact-name: relay-compiler-linux-x64
           - target: x86_64-apple-darwin