Bump Go version to v1.20 (#24439)

.github/workflows/server-ci-pr.yml

@@ -6,7 +6,7 @@ on:
       - "e2e-tests/**"
       - ".github/**"
 env:
-  go-version: "1.19.5"
+  go-version: "1.20.7"
 concurrency:
   group: ${{ github.workflow }}-${{ github.ref }}
   cancel-in-progress: true