[action] move to go1.20 for AWS builds in release

Author: dopey

.github/workflows/release.yml

@@ -111,7 +111,7 @@ jobs:
       - name: Setup Go
         uses: actions/setup-go@v3
         with:
-          go-version: 1.19
+          go-version: '${{ vars.GOLANG_VERSION_LATEST }}'
           check-latest: true
       - name: Build
         id: build